- binary_mediaInteger tensor buffer defining solid/fluid regions for complex geometries. Values: 0 = solid (closed cell, no flow), 1 = fluid (open cell, flow allowed). Internal solid boundaries must use 'boundary = wall' in boundary conditions. Domain edge boundaries (top/bottom/left/right/front/back) are specified separately.
C++ Type:std::string
Controllable:No
Description:Integer tensor buffer defining solid/fluid regions for complex geometries. Values: 0 = solid (closed cell, no flow), 1 = fluid (open cell, flow allowed). Internal solid boundaries must use 'boundary = wall' in boundary conditions. Domain edge boundaries (top/bottom/left/right/front/back) are specified separately.
- blockANY_BLOCK_ID List of subdomains for kernel coverage and material coverage checks. Setting this parameter is equivalent to setting 'kernel_coverage_block_list' and 'material_coverage_block_list' as well as using 'ONLY_LIST' as the coverage check mode.
Default:ANY_BLOCK_ID
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:List of subdomains for kernel coverage and material coverage checks. Setting this parameter is equivalent to setting 'kernel_coverage_block_list' and 'material_coverage_block_list' as well as using 'ONLY_LIST' as the coverage check mode.
- linear_sys_namesThe linear system names
C++ Type:std::vector<LinearSystemName>
Controllable:No
Description:The linear system names
- log_interval1Interval for logging LBM substep information
Default:1
C++ Type:unsigned int
Controllable:No
Description:Interval for logging LBM substep information
- print_debug_outputFalseShow Tensor specific debug outputs
Default:False
C++ Type:bool
Controllable:No
Description:Show Tensor specific debug outputs
- regard_general_exceptions_as_errorsFalseIf we catch an exception during residual/Jacobian evaluaton for which we don't have specific handling, immediately error instead of allowing the time step to be cut
Default:False
C++ Type:bool
Controllable:No
Description:If we catch an exception during residual/Jacobian evaluaton for which we don't have specific handling, immediately error instead of allowing the time step to be cut
- scalar_constant_namesScalar constant names
C++ Type:std::vector<std::string>
Controllable:No
Description:Scalar constant names
- scalar_constant_valuesScalar constant values
C++ Type:std::vector<double>
Unit:(no unit assumed)
Controllable:No
Description:Scalar constant values
- solveTrueWhether or not to actually solve the Nonlinear system. This is handy in the case that all you want to do is execute AuxKernels, Transfers, etc. without actually solving anything
Default:True
C++ Type:bool
Controllable:Yes
Description:Whether or not to actually solve the Nonlinear system. This is handy in the case that all you want to do is execute AuxKernels, Transfers, etc. without actually solving anything
- spectral_solve_substeps1How many substeps to divide the spectral solve for each MOOSE timestep into.
Default:1
C++ Type:unsigned int
Controllable:No
Description:How many substeps to divide the spectral solve for each MOOSE timestep into.
- substeps1Number of LBM iterations for every MOOSE timestep
Default:1
C++ Type:unsigned int
Controllable:No
Description:Number of LBM iterations for every MOOSE timestep
- tolerance1e-10LBM convergence tolerance
Default:1e-10
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:LBM convergence tolerance
LatticeBoltzmannProblem
Problem object to enable solving lattice Boltzmann problems
The problem object derived from TensorProblem (/TensorProblem.md) is used to solve Lattice Boltzmann simulations. It works in the same way as TensorProblem, with a few extra features. It adds stencil and boundary condition object and modifies the initialization and execution order in favor of LBM.
Overview
Problem driver specialized for Lattice Boltzmann simulations: manages stencils, distribution buffers, macroscopic fields, and substepping between collision and streaming. Provides access to LBM constants like c_s and time step for objects that require them.
Binary Media for Complex Geometries
The binary_media parameter enables simulation of flow through complex solid geometries (porous media, obstacles, etc.). It accepts an integer tensor buffer where:
Value 0**: Solid cell (closed cell) - no flow allowed, acts as a wall
Value 1**: Fluid cell (open cell) - normal flow
Value 2**: (Internal use) Fluid cell adjacent to solid boundary - automatically computed
Important Usage Notes
When using binary_media, boundary conditions must be specified for TWO distinct types of boundaries:
Domain Edge Boundaries**: Use standard boundary specifiers (
top,bottom,left,right,front,back) for the computational domain edgesInternal Solid Boundaries**: Use
boundary = wallfor the solid obstacles/structures defined by binary_media
Example with Binary Media
[TensorComputes]
[Initialize]
[binary_media]
type = ParsedCompute
buffer = binary_media
expression = '...' # expression that defined the media
extra_symbols = true
is_integer = true
[]
[]
[Boundary]
# Domain edge boundary (top wall of domain)
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
# Internal solid boundary (obstacle surface)
[obstacle_wall]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = wall # Critical: use 'wall' for binary media obstacles
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
binary_media = binary_media
substeps = 100
[]
Without binary_media, all cells default to value 1 (fluid), and only domain edge boundaries need to be specified.
Example Input File Syntax
[Problem<<<{"href": "../../syntax/Problem/index.html"}>>>]
type = LatticeBoltzmannProblem
substeps = 10
[]Input Parameters
- allow_initial_conditions_with_restartFalseTrue to allow the user to specify initial conditions when restarting. Initial conditions can override any restarted field
Default:False
C++ Type:bool
Controllable:No
Description:True to allow the user to specify initial conditions when restarting. Initial conditions can override any restarted field
- force_restartFalseEXPERIMENTAL: If true, a sub_app may use a restart file instead of using of using the master backup file
Default:False
C++ Type:bool
Controllable:No
Description:EXPERIMENTAL: If true, a sub_app may use a restart file instead of using of using the master backup file
- restart_file_baseFile base name used for restart (e.g.
/ or /LATEST to grab the latest file available) C++ Type:FileNameNoExtension
Controllable:No
Description:File base name used for restart (e.g.
/ or /LATEST to grab the latest file available)
Restart Parameters
- allow_invalid_solutionFalseSet to true to allow convergence even though the solution has been marked as 'invalid'
Default:False
C++ Type:bool
Controllable:No
Description:Set to true to allow convergence even though the solution has been marked as 'invalid'
- immediately_print_invalid_solutionFalseWhether or not to report invalid solution warnings at the time the warning is produced instead of after the calculation
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to report invalid solution warnings at the time the warning is produced instead of after the calculation
- show_invalid_solution_consoleTrueSet to true to show the invalid solution occurrence summary in console
Default:True
C++ Type:bool
Controllable:No
Description:Set to true to show the invalid solution occurrence summary in console
Solution Validity Control Parameters
- boundary_restricted_elem_integrity_checkTrueSet to false to disable checking of boundary restricted elemental object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable checking of boundary restricted elemental object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
- boundary_restricted_node_integrity_checkTrueSet to false to disable checking of boundary restricted nodal object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable checking of boundary restricted nodal object variable dependencies, e.g. are the variable dependencies defined on the selected boundaries?
- check_uo_aux_stateFalseTrue to turn on a check that no state presents during the evaluation of user objects and aux kernels
Default:False
C++ Type:bool
Controllable:No
Description:True to turn on a check that no state presents during the evaluation of user objects and aux kernels
- error_on_jacobian_nonzero_reallocationFalseThis causes PETSc to error if it had to reallocate memory in the Jacobian matrix due to not having enough nonzeros
Default:False
C++ Type:bool
Controllable:No
Description:This causes PETSc to error if it had to reallocate memory in the Jacobian matrix due to not having enough nonzeros
- fv_bcs_integrity_checkTrueSet to false to disable checking of overlapping Dirichlet and Flux BCs and/or multiple DirichletBCs per sideset
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable checking of overlapping Dirichlet and Flux BCs and/or multiple DirichletBCs per sideset
- kernel_coverage_block_listList of subdomains for kernel coverage check. The meaning of this list is controlled by the parameter 'kernel_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:List of subdomains for kernel coverage check. The meaning of this list is controlled by the parameter 'kernel_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
- kernel_coverage_checkTRUEControls, if and how a kernel subdomain coverage check is performed. With 'TRUE' or 'ON' all subdomains are checked (the default). Setting 'FALSE' or 'OFF' will disable the check for all subdomains. To exclude a predefined set of subdomains 'SKIP_LIST' is to be used, while the subdomains to skip are to be defined in the parameter 'kernel_coverage_block_list'. To limit the check to a list of subdomains, 'ONLY_LIST' is to be used (again, using the parameter 'kernel_coverage_block_list').
Default:TRUE
C++ Type:MooseEnum
Options:FALSE, TRUE, OFF, ON, SKIP_LIST, ONLY_LIST
Controllable:No
Description:Controls, if and how a kernel subdomain coverage check is performed. With 'TRUE' or 'ON' all subdomains are checked (the default). Setting 'FALSE' or 'OFF' will disable the check for all subdomains. To exclude a predefined set of subdomains 'SKIP_LIST' is to be used, while the subdomains to skip are to be defined in the parameter 'kernel_coverage_block_list'. To limit the check to a list of subdomains, 'ONLY_LIST' is to be used (again, using the parameter 'kernel_coverage_block_list').
- material_coverage_block_listList of subdomains for material coverage check. The meaning of this list is controlled by the parameter 'material_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:List of subdomains for material coverage check. The meaning of this list is controlled by the parameter 'material_coverage_check' (whether this is the list of subdomains to be checked, not to be checked or not taken into account).
- material_coverage_checkTRUEControls, if and how a material subdomain coverage check is performed. With 'TRUE' or 'ON' all subdomains are checked (the default). Setting 'FALSE' or 'OFF' will disable the check for all subdomains. To exclude a predefined set of subdomains 'SKIP_LIST' is to be used, while the subdomains to skip are to be defined in the parameter 'material_coverage_block_list'. To limit the check to a list of subdomains, 'ONLY_LIST' is to be used (again, using the parameter 'material_coverage_block_list').
Default:TRUE
C++ Type:MooseEnum
Options:FALSE, TRUE, OFF, ON, SKIP_LIST, ONLY_LIST
Controllable:No
Description:Controls, if and how a material subdomain coverage check is performed. With 'TRUE' or 'ON' all subdomains are checked (the default). Setting 'FALSE' or 'OFF' will disable the check for all subdomains. To exclude a predefined set of subdomains 'SKIP_LIST' is to be used, while the subdomains to skip are to be defined in the parameter 'material_coverage_block_list'. To limit the check to a list of subdomains, 'ONLY_LIST' is to be used (again, using the parameter 'material_coverage_block_list').
- material_dependency_checkTrueSet to false to disable material dependency check
Default:True
C++ Type:bool
Controllable:No
Description:Set to false to disable material dependency check
- skip_nl_system_checkTrueTrue to skip the NonlinearSystem check for work to do (e.g. Make sure that there are variables to solve for).
Default:True
C++ Type:bool
Controllable:No
Description:True to skip the NonlinearSystem check for work to do (e.g. Make sure that there are variables to solve for).
Simulation Checks Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- default_ghostingFalseWhether or not to use libMesh's default amount of algebraic and geometric ghosting
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to use libMesh's default amount of algebraic and geometric ghosting
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:No
Description:Set the enabled status of the MooseObject.
Advanced Parameters
- extra_tag_matricesExtra matrices to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
C++ Type:std::vector<std::vector<TagName>>
Controllable:No
Description:Extra matrices to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
- extra_tag_solutionsExtra solution vectors to add to the system that can be used by objects for coupling variable values stored in them.
C++ Type:std::vector<TagName>
Controllable:No
Description:Extra solution vectors to add to the system that can be used by objects for coupling variable values stored in them.
- extra_tag_vectorsExtra vectors to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
C++ Type:std::vector<std::vector<TagName>>
Controllable:No
Description:Extra vectors to add to the system that can be filled by objects which compute residuals and Jacobians (Kernels, BCs, etc.) by setting tags on them. The outer index is for which nonlinear system the extra tag vectors should be added for
- not_zeroed_tag_vectorsExtra vector tags which the sytem will not zero when other vector tags are zeroed. The outer index is for which nonlinear system the extra tag vectors should be added for
C++ Type:std::vector<std::vector<TagName>>
Controllable:No
Description:Extra vector tags which the sytem will not zero when other vector tags are zeroed. The outer index is for which nonlinear system the extra tag vectors should be added for
Contribution To Tagged Field Data Parameters
- identify_variable_groups_in_nlTrueWhether to identify variable groups in nonlinear systems. This affects dof ordering
Default:True
C++ Type:bool
Controllable:No
Description:Whether to identify variable groups in nonlinear systems. This affects dof ordering
- ignore_zeros_in_jacobianFalseDo not explicitly store zero values in the Jacobian matrix if true
Default:False
C++ Type:bool
Controllable:No
Description:Do not explicitly store zero values in the Jacobian matrix if true
- nl_sys_namesnl0 The nonlinear system names
Default:nl0
C++ Type:std::vector<NonlinearSystemName>
Controllable:No
Description:The nonlinear system names
- previous_nl_solution_requiredFalseTrue to indicate that this calculation requires a solution vector for storing the previous nonlinear iteration.
Default:False
C++ Type:bool
Controllable:No
Description:True to indicate that this calculation requires a solution vector for storing the previous nonlinear iteration.
- restore_original_nonzero_patternFalseWhether we should reset matrix memory for every Jacobian evaluation. This option is useful if the sparsity pattern is constantly changing and you are using hash table assembly or if you wish to continually restore the matrix to the originally preallocated sparsity pattern computed by relationship managers.
Default:False
C++ Type:bool
Controllable:No
Description:Whether we should reset matrix memory for every Jacobian evaluation. This option is useful if the sparsity pattern is constantly changing and you are using hash table assembly or if you wish to continually restore the matrix to the originally preallocated sparsity pattern computed by relationship managers.
- use_hash_table_matrix_assemblyFalseWhether to assemble matrices using hash tables instead of preallocating matrix memory. This can be a good option if the sparsity pattern changes throughout the course of the simulation.
Default:False
C++ Type:bool
Controllable:No
Description:Whether to assemble matrices using hash tables instead of preallocating matrix memory. This can be a good option if the sparsity pattern changes throughout the course of the simulation.
- use_nonlinearTrueDetermines whether to use a Nonlinear vs a Eigenvalue system (Automatically determined based on executioner)
Default:True
C++ Type:bool
Controllable:No
Description:Determines whether to use a Nonlinear vs a Eigenvalue system (Automatically determined based on executioner)
Nonlinear System(S) Parameters
- near_null_space_dimension0The dimension of the near nullspace
Default:0
C++ Type:unsigned int
Controllable:No
Description:The dimension of the near nullspace
- null_space_dimension0The dimension of the nullspace
Default:0
C++ Type:unsigned int
Controllable:No
Description:The dimension of the nullspace
- transpose_null_space_dimension0The dimension of the transpose nullspace
Default:0
C++ Type:unsigned int
Controllable:No
Description:The dimension of the transpose nullspace
Null Space Removal Parameters
- parallel_barrier_messagingFalseDisplays messaging from parallel barrier notifications when executing or transferring to/from Multiapps (default: false)
Default:False
C++ Type:bool
Controllable:No
Description:Displays messaging from parallel barrier notifications when executing or transferring to/from Multiapps (default: false)
- verbose_multiappsFalseSet to True to enable verbose screen printing related to MultiApps
Default:False
C++ Type:bool
Controllable:No
Description:Set to True to enable verbose screen printing related to MultiApps
- verbose_restoreFalseSet to True to enable verbose screen printing related to solution restoration
Default:False
C++ Type:bool
Controllable:No
Description:Set to True to enable verbose screen printing related to solution restoration
- verbose_setupfalseSet to 'true' to have the problem report on any object created. Set to 'extra' to also display all parameters.
Default:false
C++ Type:MooseEnum
Options:false, true, extra
Controllable:No
Description:Set to 'true' to have the problem report on any object created. Set to 'extra' to also display all parameters.
Verbosity Parameters
Input Files
- (examples/lbm/Phase-field/static_bubble_3d.i)
- (test/tests/lbm/vertical_density_bcs.i)
- (examples/lbm/natural_convection_3D/convection.i)
- (test/tests/lbm/convective_outflow_2d_right.i)
- (test/tests/lbm/nee_3d_box_first.i)
- (test/tests/lbm/convective_outflow_2d_left.i)
- (test/tests/lbm/mixed_bcs_d3q19_reverse.i)
- (examples/lbm/rarefied_gas/channel.i)
- (test/tests/lbm/convective_outflow_3d_left.i)
- (test/tests/lbm/convective_outflow_3d_front.i)
- (test/tests/lbm/channel3D.i)
- (test/tests/lbm/convective_outflow_3d_bottom.i)
- (test/tests/lbm/nee_3d_box_second.i)
- (test/tests/lbm/dirichlet_wall.i)
- (test/tests/lbm/mixed_bcs_d3q19.i)
- (test/tests/lbm/horizontal_mixed_bcs_d2q9_reverse.i)
- (test/tests/lbm/horizontal_mixed_bcs_d2q9.i)
- (test/tests/lbm/nee_2d_channel.i)
- (test/tests/lbm/convective_outflow_2d_bottom.i)
- (test/tests/lbm/convective_outflow_2d_top.i)
- (test/tests/lbm/dirichlet_regional.i)
- (examples/lbm/Phase-field/droplet_impact.i)
- (examples/lbm/Phase-field/spinodal_decomposition.i)
- (test/tests/lbm/channel2D.i)
- (examples/lbm/Karman-vortex/cylinder.i)
- (test/tests/lbm/convective_outflow_3d_right.i)
- (test/tests/lbm/mixed_bcs_d3q27.i)
- (test/tests/lbm/obstacle.i)
- (test/tests/lbm/neumann_regional.i)
- (test/tests/lbm/rarefied_gas.i)
- (test/tests/lbm/nee_2d_all_walls.i)
- (test/tests/lbm/isotropic_stencil_mrt.i)
- (test/tests/lbm/neumann_wall.i)
- (test/tests/lbm/neumann_box.i)
- (examples/lbm/Phase-field/static_bubble.i)
- (test/tests/lbm/phase.i)
- (test/tests/lbm/vertical_velocity_bcs.i)
- (test/tests/lbm/stacking.i)
- (test/tests/lbm/convective_outflow_3d_top.i)
- (test/tests/lbm/smagorinsky_mrt.i)
- (examples/lbm/Formula1-aerodynamics/f1.i)
- (test/tests/lbm/mixed_bcs_d3q27_reverse.i)
- (examples/lbm/Rayleigh-Benard/rayleigh-benard.i)
- (test/tests/lbm/phase_3D.i)
- (test/tests/lbm/convective_outflow_3d_back.i)
- (examples/lbm/Phase-field/layered_poiseuille.i)
- (test/tests/lbm/dirichlet_box.i)
- (examples/lbm/Pebbles/pebbles.i)
(test/tests/lbm/channel2D.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type=LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 10
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 11
[]
[Outputs]
file_base = channel2D
csv = true
[]
(examples/lbm/Phase-field/static_bubble_3d.i)
#
# 3D Static bubble test case
# Based on the 2D static bubble (PHYSICAL REVIEW E 97, 033309 - Section III.A)
# Small domain to verify 3D gradient/laplacian correctness
#
# Domain (small for quick testing)
Nx = 40
Ny = 40
Nz = 40
# Bubble parameters
Cx = '${Nx}/2.0'
Cy = '${Ny}/2.0'
Cz = '${Nz}/2.0'
R = 12
# Fluid properties
rho_l = 1000.0
rho_g = 1.0
nu_l = 0.1
nu_g = 0.1
sigma = 0.001
# Phase field parameters
tau_h = 0.7
D = 4
[Domain]
dim = 3
nx = '${Nx}'
ny = '${Ny}'
nz = '${Nz}'
xmax = '${Nx}'
ymax = '${Ny}'
zmax = '${Nz}'
device_names = 'cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q27]
type = LBMD3Q27
[]
[]
[TensorBuffers]
# Macroscopic phase field variables
[phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
# Macroscopic hydrodynamic variables
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM phase field variables
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM hydrodynamic variables
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[phi_init]
type = ParsedCompute
buffer = phi
expression = '0.5 + 0.5 * tanh(2*(R - sqrt((x - Cx)^2 + (y - Cy)^2 + (z - Cz)^2)) / D)'
constant_names = 'Cx Cy Cz R D'
constant_expressions = '${Cx} ${Cy} ${Cz} ${R} ${D}'
extra_symbols = true
[]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_post_collision_init]
type = LBMPhaseEquilibrium
buffer = h_post_collision
phi = phi
velocity = velocity
[]
[h_init]
type = LBMPhaseEquilibrium
buffer = h
phi = phi
velocity = velocity
[]
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
# Phase Field
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
# Hydrodynamics
[density]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
[]
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
extra_symbols = true
expression = '(phi*(nu_l - nu_g) + nu_g)/cs2+0.5'
constant_names = 'nu_l nu_g cs2'
constant_expressions = '${nu_l} ${nu_g} 0.3333'
inputs = phi
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[residual]
type = LBMComputeResidual
buffer = phi
speed = phi
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
root_compute = residual
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MAX
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 10
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
[]
[Executioner]
type = Transient
num_steps = 50
[]
[TensorOutputs]
[xdmf]
type = XDMFTensorOutput
buffer = 'phi rho velocity forces'
output_mode = 'Cell Cell Cell Cell'
enable_hdf5 = true
# transpose = false
[]
[]
(test/tests/lbm/vertical_density_bcs.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[left]
type = LBMBounceBack
buffer = f
f_old = f_bounce_back
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = f_bounce_back
boundary = right
[]
[top]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.1
boundary = top
[]
[bottom]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.00000
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 2
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = vertical_density_bcs
csv = true
[]
(examples/lbm/natural_convection_3D/convection.i)
[Domain]
dim = 3
nx = 270
ny = 270
nz = 405
xmax = 270
ymax = 270
zmax = 405
device_names='cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
floating_precision=SINGLE
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
# Simulation binary media
[binary_media]
type = LBMTensorBuffer
file = binary_media.h5
buffer_type = ms
is_integer = true
[]
# Density distribution functions
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
# Temperature distribution functions
[g]
type = LBMTensorBuffer
buffer_type = df
[]
[geq]
type = LBMTensorBuffer
buffer_type = df
[]
[gpc]
type = LBMTensorBuffer
buffer_type = df
[]
# Fluid macroscopic variables: density and velocity
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
# Temperature macroscpic variables: temperature and 'velocity'
[T]
type = LBMTensorBuffer
buffer_type = ms
[]
# Forces
[F]
type = LBMTensorBuffer
buffer_type = mv
[]
[]
[TensorComputes]
[Initialize]
[density]
type = LBMConstantTensor
buffer = density
constants = 'rho0'
[]
[velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[temperature]
type = LBMConstantTensor
buffer = T
constants = T_C
[]
[equilibrium_fluid]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[equilibrium_fluid_total]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[equilibrium_fluid_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[equilibrium_temperature]
type = LBMEquilibrium
buffer = geq
bulk = T
velocity = velocity
[]
[equilibrium_temperature_total]
type = LBMEquilibrium
buffer = g
bulk = T
velocity = velocity
[]
[equilibrium_temperature_pc]
type = LBMEquilibrium
buffer = gpc
bulk = T
velocity = velocity
[]
[]
#### Compute ####
[Solve]
# For temperature
[Temperature]
type = LBMComputeDensity
buffer = T
f = g
[]
# For fluid
[Fluid_density]
type = LBMComputeDensity
buffer = density
f = f
[]
[Fluid_velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
forces = F
enable_forces = true
[]
# For temperature
[Equilibrium_temperature]
type = LBMEquilibrium
buffer = geq
bulk = T
velocity = velocity
[]
[Collision_temperature]
type = LBMBGKCollision
buffer = gpc
f = g
feq = geq
tau0 = tau_T
[]
# For fluid
[Compute_forces]
type = LBMComputeForces
buffer = F
rho0 = 'rho0'
temperature = T
T0 = 1.00
enable_buoyancy = true
gravity = g
gravity_direction = 2
[]
[Equilibrium_fluid]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[Collision_fluid]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = tau_f
[]
[Apply_forces]
type = LBMApplyForces
buffer = fpc
velocity = velocity
rho = density
forces = F
tau0 = tau_f
[]
[Residual]
type = LBMComputeResidual
speed = T
# TODO this buffer is redundant, but avoids 'missing parameter' error
buffer = T
[]
[]
#### Boundary ####
[Boundary]
##### for fluid
[wall]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = wall
[]
##### for temperature
[heat_source]
type = LBMNeumannBC
buffer = g
f_old = gpc
feq=geq
velocity = velocity
rho = T
gradient = 0.001
region_id = 3
boundary = regional
[]
[walls]
type = LBMDirichletBC
buffer = g
f_old = gpc
feq=geq
velocity = velocity
rho = T
value = 1.0
region_id = 2
boundary = regional
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'f g'
f_old = 'fpc gpc'
root_compute = Residual
[]
[Problem]
type = LatticeBoltzmannProblem
binary_media = binary_media
scalar_constant_names = 'rho0 T_C T_H tau_f tau_T g'
scalar_constant_values = '1.0 1.0 1.05 0.55 0.55 0.01'
substeps = 100
print_debug_output = true
[]
[Executioner]
type = Transient
num_steps = 1000
[]
[TensorOutputs]
[xdmf2]
type = XDMFTensorOutput
buffer = 'T density velocity'
output_mode = 'Cell Cell Cell'
enable_hdf5 = true
[]
[]
(test/tests/lbm/convective_outflow_2d_right.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[left]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.005
uy = 0.0
order = first
boundary = left
[]
[right]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = auto
boundary = right
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_2d_right
csv = true
[]
(test/tests/lbm/nee_3d_box_first.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[left]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = first
boundary = left
[]
[right]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = first
boundary = right
[]
[top]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = first
boundary = top
[]
[bottom]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = first
boundary = bottom
[]
[front]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = first
boundary = front
[]
[back]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = first
boundary = back
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = nee_3d_box_first
csv = true
[]
(test/tests/lbm/convective_outflow_2d_left.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[right]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = -0.005
uy = 0.0
order = first
boundary = right
[]
[left]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = auto
boundary = left
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_2d_left
csv = true
[]
(test/tests/lbm/mixed_bcs_d3q19_reverse.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005 0.0'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[right]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.11
boundary = right
[]
[left]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.0001
boundary = left
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = mixed_bcs_d3q19_reverse
csv = true
[]
(examples/lbm/rarefied_gas/channel.i)
[Domain]
dim = 2
nx = 102
ny = 102
xmax = 102
ymax = 102
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[domain]
type=LBMTensorBuffer
file = binary_media.h5
buffer_type = ms
is_integer = true
[]
[local_pore]
type=LBMTensorBuffer
file = local_pore_size.h5
buffer_type = ms
is_integer = false
[]
[Kn]
type=LBMTensorBuffer
file = Kn.h5
buffer_type = ms
is_integer = false
[]
[relaxation_matrix]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 0.2355545440759889
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[relaxation_matrix_init]
type = LBMComputeEffectiveRelaxation
buffer = relaxation_matrix
local_pore_size = local_pore
local_Knudsen_number = Kn
mfp = 7.904614716131531e-10
dx = 0.122e-9
A2 = 0.82
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 1.0e-8
[]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMMRTCollision
buffer = fpc
f = f
feq = feq
is_dynamic_relaxation = true
local_relaxation_matrix = relaxation_matrix
projection = true
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[wall]
type = LBMSpecularReflectionBoundary
buffer = f
f_old = fpc
local_Knudsen_number = Kn
boundary = wall
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
root_compute = residual
[]
[Postprocessors]
[max_u]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
execute_on = 'INITIAL TIMESTEP_END'
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 2000
print_debug_output = true
binary_media = domain
[]
[Executioner]
type = Transient
num_steps = 2
[]
[TensorOutputs]
[xdmf2]
type = XDMFTensorOutput
buffer = 'density velocity speed'
output_mode = 'Cell Cell Cell'
enable_hdf5 = true
transpose=false
[]
[]
(test/tests/lbm/convective_outflow_3d_left.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[right]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = -0.005
uy = 0.0
uz = 0.0
order = first
boundary = right
[]
[left]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = Uc
boundary = left
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[front]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = front
[]
[back]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = back
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'Uc'
scalar_constant_values = '0.005'
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_3d_left
csv = true
[]
(test/tests/lbm/convective_outflow_3d_front.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[back]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = -0.005
order = first
boundary = back
[]
[front]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = Uc
boundary = front
[]
[left]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = right
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'Uc'
scalar_constant_values = '0.005'
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_3d_front
csv = true
[]
(test/tests/lbm/channel3D.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type=LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 10
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 11
[]
[Outputs]
file_base = channel3D
csv = true
[]
(test/tests/lbm/convective_outflow_3d_bottom.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[top]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = -0.005
uz = 0.0
order = first
boundary = top
[]
[bottom]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = Uc
boundary = bottom
[]
[left]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = right
[]
[front]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = front
[]
[back]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = back
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'Uc'
scalar_constant_values = '0.005'
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_3d_bottom
csv = true
[]
(test/tests/lbm/nee_3d_box_second.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[left]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.005
uy = 0.0
uz = 0.0
order = second
boundary = left
[]
[right]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = density
prescribed_rho = 1.0
order = second
boundary = right
[]
[top]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = second
boundary = top
[]
[bottom]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.0
order = second
boundary = bottom
[]
[front]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = density
prescribed_rho = 1.0
order = second
boundary = front
[]
[back]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = density
prescribed_rho = 1.0
order = second
boundary = back
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = nee_3d_box_second
csv = true
[]
(test/tests/lbm/dirichlet_wall.i)
[Domain]
dim = 2
nx = 11
ny = 11
mesh_mode=DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[T]
type=LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[binary_media]
type = LBMTensorBuffer
file = binary_media.h5
is_integer = true
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[init_T]
type = LBMConstantTensor
buffer = T
constants = 1.0
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = T
velocity = velocity
[]
[non_equilibrium]
type = LBMEquilibrium
buffer = f
bulk = T
velocity = velocity
[]
[post_collision_equilibrium]
type = LBMEquilibrium
buffer = fpc
bulk = T
velocity = velocity
[]
[]
[Solve]
[T]
type = LBMComputeDensity
buffer = T
f = f
[]
[]
[Boundary]
[wall]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = T
value = 1.1
boundary = wall
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
binary_media = binary_media
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = dirichlet_wall
csv = true
[]
(test/tests/lbm/mixed_bcs_d3q19.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005 0.0'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[left]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.11
boundary = left
[]
[right]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.0001
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = mixed_bcs_d3q19
csv = true
[]
(test/tests/lbm/horizontal_mixed_bcs_d2q9_reverse.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[right]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.1
boundary = right
[]
[left]
type = LBMMicroscopicZeroGradientBC
buffer = f
boundary = left
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = horizontal_mixed_bcs_d2q9_reverse
csv = true
[]
(test/tests/lbm/horizontal_mixed_bcs_d2q9.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[left]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.1
boundary = left
[]
[right]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.0001
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = horizontal_mixed_bcs_d2q9
csv = true
[]
(test/tests/lbm/nee_2d_channel.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[left]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.005
uy = 0.0
order = first
boundary = left
[]
[right]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = density
prescribed_rho = 1.0
order = first
boundary = right
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = nee_2d_channel
csv = true
[]
(test/tests/lbm/convective_outflow_2d_bottom.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[top]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = -0.005
order = first
boundary = top
[]
[bottom]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = auto
boundary = bottom
[]
[left]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_2d_bottom
csv = true
[]
(test/tests/lbm/convective_outflow_2d_top.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[bottom]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.005
order = first
boundary = bottom
[]
[top]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = auto
boundary = top
[]
[left]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_2d_top
csv = true
[]
(test/tests/lbm/dirichlet_regional.i)
[Domain]
dim = 2
nx = 11
ny = 11
mesh_mode=DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[T]
type=LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[binary_media]
type = LBMTensorBuffer
file = binary_regional.h5
is_integer = true
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[init_T]
type = LBMConstantTensor
buffer = T
constants = 1.0
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = T
velocity = velocity
[]
[non_equilibrium]
type = LBMEquilibrium
buffer = f
bulk = T
velocity = velocity
[]
[post_collision_equilibrium]
type = LBMEquilibrium
buffer = fpc
bulk = T
velocity = velocity
[]
[]
[Solve]
[T]
type = LBMComputeDensity
buffer = T
f = f
[]
[]
[Boundary]
[regional]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = T
value = 1.1
region_id = 2
boundary = regional
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
binary_media = binary_media
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = dirichlet_regional
csv = true
[]
(examples/lbm/Phase-field/droplet_impact.i)
#
# Droplet Impact on a Thin Liquid Film
# PHYSICAL REVIEW E 97, 033309 (2018) - Section III.D
#
# Domain
Nx = 1500
Ny = 500
# Fluid properties (Re=500, We=8000, 1000:1)
rho_l = 1000.0
rho_g = 1.0
# mu_l = 20.0
# mu_g = 0.2
nu_l = 0.02
nu_g = 0.2
sigma = 0.0625
# Phase field parameters
tau_h = 0.8
D = 5
[Domain]
dim = 2
nx = '${Nx}'
ny = '${Ny}'
xmax = '${Nx}'
ymax = '${Ny}'
device_names = 'cuda'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[phi]
type = LBMTensorBuffer
buffer_type = ms
file = phi.h5
[]
[ux]
type = LBMTensorBuffer
buffer_type = ms
file = ux.h5
[]
[uy]
type = LBMTensorBuffer
buffer_type = ms
file = uy.h5
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
[speed]
type = LBMTensorBuffer
buffer_type = ms
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[u_stack]
type = LBMStackTensors
buffer = velocity
inputs = 'ux uy'
[]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
expression = 'phi * (rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
# Equilibrium
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_init]
type = ParsedCompute
buffer = h
expression = 'h_eq'
inputs = h_eq
[]
[h_post_collision_init]
type = ParsedCompute
buffer = h_post_collision
expression = 'h_eq'
inputs = h_eq
[]
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[compute_forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
[density]
type = ParsedCompute
buffer = rho
expression = 'phi * (rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
[]
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
expression = '(phi * (nu_l - nu_g) + nu_g) / cs2 + 0.5'
constant_names = 'nu_l nu_g cs2'
constant_expressions = '${nu_l} ${nu_g} 0.333333333333'
inputs = 'phi'
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[residual]
type = LBMComputeResidual
buffer = phi
speed = phi
[]
[]
[TensorComputes/Boundary]
# Bounce back on both top and bottom
[top_fluid]
type = LBMBounceBack
buffer = f
f_old = f_post_collision
boundary = top
[]
[bottom_fluid]
type = LBMBounceBack
buffer = f
f_old = f_post_collision
boundary = bottom
[]
[top_phase]
type = LBMBounceBack
buffer = h
f_old = h_post_collision
boundary = top
[]
[bottom_phase]
type = LBMBounceBack
buffer = h
f_old = h_post_collision
boundary = bottom
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
root_compute = residual
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 200
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
[]
[Executioner]
type = Transient
num_steps = 50
[]
[TensorOutputs]
[xdmf]
type = XDMFTensorOutput
buffer = 'phi velocity rho'
output_mode = 'Cell Cell Cell'
enable_hdf5 = true
transpose = false
[]
[]
(examples/lbm/Phase-field/spinodal_decomposition.i)
#
# Spinodal decomposition
# PHYSICAL REVIEW E 97, 033309 (2018) - Section III.C
#
# Domain
Nx = 200
Ny = 200
# Fluid properties
rho_l = 1000.0
rho_g = 1.0
nu_l = 0.1
nu_g = 1.0
sigma = 0.2
# Phase field parameters
tau_h = 0.67
D = 4
[Domain]
dim = 2
nx = '${Nx}'
ny = '${Ny}'
xmax = '${Nx}'
ymax = '${Ny}'
device_names='cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
# Macroscopic phase field variables
[phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
# Macroscopic hydrodynamic variables
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM phase field variabels
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM hydrodynamic variables
[fdummy]
type = LBMTensorBuffer
buffer_type = df
[]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[phi_init]
type = RandomTensor
buffer = phi
min = 0.3233
max = 0.3433
[]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
# Phase field equilibrium distribution initialization
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_post_collision_init]
type = LBMPhaseEquilibrium
buffer = h_post_collision
phi = phi
velocity = velocity
[]
[h_init]
type = LBMPhaseEquilibrium
buffer = h
phi = phi
velocity = velocity
[]
# Hydrodynamic equilibrium distribution initialization
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
# Phase Field
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
# Hydrodynamics
[density]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
[]
# Phase-field
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
# Hydrodynamics
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
extra_symbols = true
expression = '(phi*(nu_l - nu_g) + nu_g)/cs2+0.5'
constant_names = 'nu_l nu_g cs2'
constant_expressions = '${nu_l} ${nu_g} 0.3333'
inputs = phi
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[residual]
type = LBMComputeResidual
buffer = phi
speed = phi
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
root_compute = residual
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 500
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
log_interval = 100
[]
[Executioner]
type = Transient
num_steps = 100
[]
[TensorOutputs]
[xdmf]
type = XDMFTensorOutput
buffer = 'phi rho velocity'
output_mode = 'Cell Cell Cell'
enable_hdf5 = true
# transpose = false
[]
[]
(test/tests/lbm/channel2D.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type=LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 10
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 11
[]
[Outputs]
file_base = channel2D
csv = true
[]
(examples/lbm/Karman-vortex/cylinder.i)
[Domain]
dim = 2
nx = 800
ny = 200
xmax = 4
ymax = 1
device_names='cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[rho]
type=LBMTensorBuffer
buffer_type = ms
[]
[u]
type=LBMTensorBuffer
buffer_type = mv
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[f]
type=LBMTensorBuffer
buffer_type = df
[]
[feq]
type=LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type=LBMTensorBuffer
buffer_type = df
[]
[binary_media]
type = LBMTensorBuffer
file = binary_media.h5
is_integer = true
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[rho]
type=LBMConstantTensor
buffer=rho
constants = rho0
[]
[u]
type=LBMConstantTensor
buffer=u
constants = 'Ux Uy'
[]
[speed]
type=LBMComputeVelocityMagnitude
buffer=speed
velocity=u
[]
[feq]
type=LBMEquilibrium
buffer=feq
bulk=rho
velocity=u
[]
[f]
type=LBMEquilibrium
buffer=f
bulk=rho
velocity=u
[]
[f_post_coll]
type=LBMEquilibrium
buffer=f_post_collision
bulk=rho
velocity=u
[]
[]
[Solve]
[Density]
type = LBMComputeDensity
buffer=rho
f = f
[]
[Velocity]
type = LBMComputeVelocity
buffer=u
f = f
rho = rho
[]
[Equilibrium]
type = LBMEquilibrium
buffer=feq
bulk=rho
velocity=u
[]
[Collision]
type = LBMSmagorinskyCollision
buffer = f_post_collision
f = f
feq = feq
tau0 = tau
projection=true
[]
[Speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = u
[]
[Residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[wall]
type = LBMBounceBack
buffer = f
f_old = f_post_collision
boundary = wall
[]
[left]
type = LBMFixedFirstOrderBC
buffer=f
f=f
value='Ux'
perturb=true
boundary=left
[]
[right]
type = LBMMicroscopicZeroGradientBC
buffer=f
boundary=right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_post_collision
root_compute=residual
[]
[Postprocessors]
[rho_avg]
type = TensorAveragePostprocessor
buffer = rho
execute_on = 'TIMESTEP_END'
[]
[speed_avg]
type = TensorAveragePostprocessor
buffer = speed
execute_on = 'TIMESTEP_END'
[]
[reynolds]
type = ComputeReynoldsNumber
buffer = speed
tau = tau
diameter = D
[]
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'rho0 Ux Uy tau dx D Cs'
scalar_constant_values = '1.0 0.01 0.0 0.506 0.001 40 0.15'
substeps = 100
print_debug_output=true
binary_media = binary_media
[]
[Executioner]
type = Transient
num_steps = 10000
[]
[TensorOutputs]
[xdmf2]
type = XDMFTensorOutput
buffer = 'rho u speed binary_media'
output_mode = 'Cell Cell Cell Cell'
enable_hdf5 = true
[]
[]
(test/tests/lbm/convective_outflow_3d_right.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[left]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.005
uy = 0.0
uz = 0.0
order = first
boundary = left
[]
[right]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = Uc
boundary = right
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[front]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = front
[]
[back]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = back
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'Uc'
scalar_constant_values = '0.005'
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_3d_right
csv = true
[]
(test/tests/lbm/mixed_bcs_d3q27.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q27]
type = LBMD3Q27
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005 0.0'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[left]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.1
boundary = left
[]
[right]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.0001
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = mixed_bcs_d3q27
csv = true
[]
(test/tests/lbm/obstacle.i)
[Domain]
dim = 2
nx = 11
ny = 11
mesh_mode=DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[rho]
type=LBMTensorBuffer
buffer_type = ms
[]
[u]
type=LBMTensorBuffer
buffer_type = mv
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[f]
type=LBMTensorBuffer
buffer_type = df
[]
[feq]
type=LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type=LBMTensorBuffer
buffer_type = df
[]
[binary_media]
type = LBMTensorBuffer
file = binary_media.h5
is_integer = true
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[rho]
type=LBMConstantTensor
buffer=rho
constants = rho0
[]
[u]
type=LBMConstantTensor
buffer=u
constants = 'Ux Uy'
[]
[speed]
type=LBMComputeVelocityMagnitude
buffer=speed
velocity=u
[]
[feq]
type=LBMEquilibrium
buffer=feq
bulk=rho
velocity=u
[]
[f]
type=LBMEquilibrium
buffer=f
bulk=rho
velocity=u
[]
[f_post_coll]
type=LBMEquilibrium
buffer=f_post_collision
bulk=rho
velocity=u
[]
[]
[Solve]
[Density]
type = LBMComputeDensity
buffer=rho
f = f
[]
[Velocity]
type = LBMComputeVelocity
buffer=u
f = f
rho = rho
[]
[Equilibrium]
type = LBMEquilibrium
buffer=feq
bulk=rho
velocity=u
[]
[Collision]
type = LBMSmagorinskyCollision
buffer = f_post_collision
f = f
feq = feq
tau0 = tau
projection=true
[]
[Speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = u
[]
[Residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[wall]
type = LBMBounceBack
buffer = f
f_old = f_post_collision
boundary = wall
[]
[left]
type = LBMFixedFirstOrderBC
buffer=f
f=f
value='Ux'
perturb=true
boundary=left
[]
[right]
type = LBMMicroscopicZeroGradientBC
buffer=f
boundary=right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_post_collision
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'rho0 Ux Uy tau dx D Cs'
scalar_constant_values = '1.0 0.01 0.0 0.501 0.001 50 0.15'
substeps = 5
print_debug_output=true
binary_media = binary_media
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = u
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = u
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = obstacle
csv = true
[]
(test/tests/lbm/neumann_regional.i)
[Domain]
dim = 2
nx = 11
ny = 11
mesh_mode=DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[T]
type=LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[binary_media]
type = LBMTensorBuffer
file = binary_regional.h5
is_integer = true
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[init_T]
type = LBMConstantTensor
buffer = T
constants = 1.0
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = T
velocity = velocity
[]
[non_equilibrium]
type = LBMEquilibrium
buffer = f
bulk = T
velocity = velocity
[]
[post_collision_equilibrium]
type = LBMEquilibrium
buffer = fpc
bulk = T
velocity = velocity
[]
[]
[Solve]
[T]
type = LBMComputeDensity
buffer = T
f = f
[]
[]
[Boundary]
[regional]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = T
gradient = 0.1
region_id = 2
boundary = regional
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
binary_media = binary_media
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = neumann_regional
csv = true
[]
(test/tests/lbm/rarefied_gas.i)
[Domain]
dim = 2
nx = 48
ny = 48
xmax = 48
ymax = 48
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[domain]
type=LBMTensorBuffer
file = nanochannel.h5
buffer_type = ms
is_integer = true
[]
[local_pore]
type=LBMTensorBuffer
file = local_pore_size.h5
buffer_type = ms
is_integer = false
[]
[Kn]
type=LBMTensorBuffer
file = Kn.h5
buffer_type = ms
is_integer = false
[]
[relaxation_matrix]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 0.2355545440759889
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[relaxation_matrix_init]
type = LBMComputeEffectiveRelaxation
buffer = relaxation_matrix
local_pore_size = local_pore
local_Knudsen_number = Kn
mfp = 7.904614716131531e-10
dx = 1.0e-9
A2 = 0.82
[]
[]
[Solve]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMMRTCollision
buffer = fpc
f = f
feq = feq
is_dynamic_relaxation = true
local_relaxation_matrix = relaxation_matrix
projection = true
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 1.0e-9
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[wall]
type = LBMSpecularReflectionBoundary
buffer = f
f_old = fpc
local_Knudsen_number = Kn
boundary = wall
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 10
print_debug_output = true
binary_media = domain
[]
[Executioner]
type = Transient
num_steps = 10
[]
[Outputs]
file_base = rarefied_gas
csv = true
[]
(test/tests/lbm/nee_2d_all_walls.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[top]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.005
uy = 0.0
order = second
boundary = top
[]
[bottom]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
order = second
boundary = bottom
[]
[left]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
order = second
boundary = left
[]
[right]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
order = second
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = nee_2d_all_walls
csv = true
[]
(test/tests/lbm/isotropic_stencil_mrt.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q27]
type = LBMD3Q27
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type=LBMMRTCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 11
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = isotropic_stencil_mrt
csv = true
[]
(test/tests/lbm/neumann_wall.i)
[Domain]
dim = 2
nx = 11
ny = 11
mesh_mode=DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[T]
type=LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[binary_media]
type = LBMTensorBuffer
file = binary_media.h5
is_integer = true
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[init_T]
type = LBMConstantTensor
buffer = T
constants = 1.0
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = T
velocity = velocity
[]
[non_equilibrium]
type = LBMEquilibrium
buffer = f
bulk = T
velocity = velocity
[]
[post_collision_equilibrium]
type = LBMEquilibrium
buffer = fpc
bulk = T
velocity = velocity
[]
[]
[Solve]
[T]
type = LBMComputeDensity
buffer = T
f = f
[]
[]
[Boundary]
[wall]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = T
gradient = 0.1
boundary = wall
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
binary_media = binary_media
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = T
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = neumann_wall
csv = true
[]
(test/tests/lbm/neumann_box.i)
[Domain]
dim = 3
nx = 5
ny = 5
nz = 5
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[]
[TensorComputes]
[Initialize]
[init_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[non_equilibrium]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[post_collision_equilibrium]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[]
[Boundary]
[left]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
gradient = 0.001
boundary = left
[]
[right]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
gradient = 0.1
boundary = right
[]
[top]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
gradient = 0.1
boundary = top
[]
[bottom]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
gradient = 0.1
boundary = bottom
[]
[front]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
gradient = 0.1
boundary = front
[]
[back]
type = LBMNeumannBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
gradient = 0.1
boundary = back
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = neumann_box
csv = true
[]
(examples/lbm/Phase-field/static_bubble.i)
#
# Static bubble test case
# PHYSICAL REVIEW E 97, 033309 (2018) - Section III.A
# Intended outcome is to have (spurious) velocity magnitude around 1.0e-10
#
# Domain
Nx = 200
Ny = 200
# Bubble parameters
Cx = '${Nx}/2.0'
Cy = '${Ny}/2.0'
R = 50
# Fluid properties
rho_l = 1000.0
rho_g = 1.0
nu_l = 0.1
nu_g = 0.1
sigma = 0.001
# Phase field parameters
tau_h = 0.7
D = 5
[Domain]
dim = 2
nx = '${Nx}'
ny = '${Ny}'
xmax = '${Nx}'
ymax = '${Ny}'
device_names='cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
# Macroscopic phase field variables
[phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
# Macroscopic hydrodynamic variables
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM phase field variabels
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM hydrodynamic variables
[fdummy]
type = LBMTensorBuffer
buffer_type = df
[]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[phi_init]
type = ParsedCompute
buffer = phi
expression = '0.5 + 0.5 * tanh(2*(R - sqrt((x - Cx)^2 + (y - Cy)^2)) / D)'
constant_names = 'Cx Cy R D'
constant_expressions = '${Cx} ${Cy} ${R} ${D}'
extra_symbols = true
[]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
# Phase field equilibrium distribution initialization
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_post_collision_init]
type = LBMPhaseEquilibrium
buffer = h_post_collision
phi = phi
velocity = velocity
[]
[h_init]
type = LBMPhaseEquilibrium
buffer = h
phi = phi
velocity = velocity
[]
# Hydrodynamic equilibrium distribution initialization
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
# Phase Field
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
# Hydrodynamics
[density]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
[]
# Phase-field
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
# Hydrodynamics
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
extra_symbols = true
expression = '(phi*(nu_l - nu_g) + nu_g)/cs2+0.5'
constant_names = 'nu_l nu_g cs2'
constant_expressions = '${nu_l} ${nu_g} 0.3333'
inputs = phi
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[residual]
type = LBMComputeResidual
buffer = phi
speed = phi
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
root_compute = residual
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 50
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
[]
[Executioner]
type = Transient
num_steps = 100
[]
[TensorOutputs]
[xdmf]
type = XDMFTensorOutput
buffer = 'phi rho velocity forces'
output_mode = 'Cell Cell Cell Cell'
enable_hdf5 = true
# transpose = false
[]
[]
(test/tests/lbm/phase.i)
# Domain
Nx = 20
Ny = 20
# Fluid properties
rho_l = 5.0
rho_g = 1.0
nu_l = 0.1
nu_g = 1.0
sigma = 0.2
# Phase field parameters
tau_h = 1.0
D = 4
[Domain]
dim = 2
nx = '${Nx}'
ny = '${Ny}'
xmax = '${Nx}'
ymax = '${Ny}'
device_names='cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
# Macroscopic phase field variables
[phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
# Macroscopic hydrodynamic variables
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM phase field variabels
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM hydrodynamic variables
[fdummy]
type = LBMTensorBuffer
buffer_type = df
[]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[phi_init]
type = ParsedCompute
buffer = phi
extra_symbols = true
expression = '0.3333 + 0.01*sin((12.9898*x + 78.233*y)*2*pi)'
[]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
# Phase field equilibrium distribution initialization
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_post_collision_init]
type = LBMPhaseEquilibrium
buffer = h_post_collision
phi = phi
velocity = velocity
[]
[h_init]
type = LBMPhaseEquilibrium
buffer = h
phi = phi
velocity = velocity
[]
# Hydrodynamic equilibrium distribution initialization
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
# Phase Field
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
# Hydrodynamics
[density]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
[]
# Phase-field
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
# Hydrodynamics
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
extra_symbols = true
expression = '(phi*(nu_l - nu_g) + nu_g)/cs2+0.5'
constant_names = 'nu_l nu_g cs2'
constant_expressions = '${nu_l} ${nu_g} 0.3333'
inputs = phi
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[residual]
type = LBMComputeResidual
buffer = phi
speed = phi
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
[]
[Postprocessors]
[phi_min]
type = TensorExtremeValuePostprocessor
buffer = phi
value_type = MIN
[]
[phi_max]
type = TensorExtremeValuePostprocessor
buffer = phi
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MAX
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 5
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = phase
csv = true
[]
(test/tests/lbm/vertical_velocity_bcs.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[left]
type = LBMBounceBack
buffer = f
f_old = f_bounce_back
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = f_bounce_back
boundary = right
[]
[top]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.0001
boundary = top
[]
[bottom]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.00011
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 2
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = vertical_velocity_bcs
csv = true
[]
(test/tests/lbm/stacking.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[ux]
type=LBMTensorBuffer
buffer_type = ms
[]
[uy]
type=LBMTensorBuffer
buffer_type = ms
[]
[u]
type=LBMTensorBuffer
buffer_type = mv
[]
[]
[TensorComputes/Initialize]
[velocity_x]
type = ParsedCompute
buffer = ux
expression = '0.1*sin(x/(2*pi*4))*cos(y/(2*pi*4))'
extra_symbols=true
[]
[velocity_y]
type = ParsedCompute
buffer = uy
expression = '-0.1*cos(x/(2*pi*4))*sin(y/(2*pi*4))'
extra_symbols=true
[]
[u_stack]
type=LBMStackTensors
buffer=u
inputs='ux uy'
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_x_min]
type = TensorExtremeValuePostprocessor
buffer = ux
value_type = MIN
[]
[velocity_x_max]
type = TensorExtremeValuePostprocessor
buffer = ux
value_type = MAX
[]
[velocity_y_min]
type = TensorExtremeValuePostprocessor
buffer = uy
value_type = MIN
[]
[velocity_y_max]
type = TensorExtremeValuePostprocessor
buffer = uy
value_type = MAX
[]
[u_stack_min]
type = TensorExtremeValuePostprocessor
buffer = u
value_type = MIN
[]
[u_stack_max]
type = TensorExtremeValuePostprocessor
buffer = u
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 2
[]
[Outputs]
file_base = stacking
csv = true
[]
(test/tests/lbm/convective_outflow_3d_top.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[bottom]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.005
uz = 0.0
order = first
boundary = bottom
[]
[top]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = Uc
boundary = top
[]
[left]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = right
[]
[front]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = front
[]
[back]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = back
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'Uc'
scalar_constant_values = '0.005'
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_3d_top
csv = true
[]
(test/tests/lbm/smagorinsky_mrt.i)
[Domain]
dim = 2
nx = 10
ny = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[initial_equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_distribution]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_distribution_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[root]
[equilibrium]
type=LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type=LBMSmagorinskyMRTCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[]
[Boundary]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
root_compute = root
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 11
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[speed_min]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MIN
[]
[speed_max]
type = TensorExtremeValuePostprocessor
buffer = speed
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = smagorinsky_mrt
csv = true
[]
(examples/lbm/Formula1-aerodynamics/f1.i)
[Domain]
dim = 3
nx = 781
ny = 274
nz = 146
xmax = 781
ymax = 274
zmax = 146
device_names='cuda'
floating_precision = 'single'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[descriptor]
type = LBMD3Q27
[]
[]
[TensorBuffers]
[binary_media]
type = LBMTensorBuffer
buffer_type = ms
file = 'binary_media.h5'
is_integer = true
[]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[u]
type = LBMTensorBuffer
buffer_type = mv
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
[force]
type = LBMTensorBuffer
buffer_type = mv
[]
[]
[TensorComputes]
[Initialize]
[density_initial]
type = LBMConstantTensor
buffer = rho
constants = 1.0
[]
[velocity_initial]
type = LBMConstantTensor
buffer = u
constants = '0 0 0'
[]
[equilibrium_init]
type = LBMEquilibrium
buffer = feq
bulk = rho
velocity = u
[]
[equilibrium_f]
type = LBMEquilibrium
buffer = f
bulk = rho
velocity = u
[]
[equilibrium_pc]
type = LBMEquilibrium
buffer = fpc
bulk = rho
velocity = u
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = rho
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = u
f = f
rho = rho
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = rho
velocity = u
[]
[collision]
type = LBMSmagorinskyCollision
buffer = fpc
f = f
feq = feq
tau0 = 0.5001
Cs = 0.15
projection=true
[]
[speed]
type=LBMComputeVelocityMagnitude
buffer=speed
velocity=u
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[Boundary]
[wall]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = wall
[]
[left]
type = LBMFixedFirstOrderBC
buffer=f
f=f
value=0.01
boundary=left
# perturb=true
[]
[right]
type = LBMMicroscopicZeroGradientBC
buffer=f
boundary = right
[]
[]
[]
[TensorSolver]
type = LBMStream
root_compute = residual
buffer = f
f_old = fpc
[]
[Postprocessors]
[reynolds]
type = ComputeReynoldsNumber
buffer = speed
tau = 0.5001
diameter = 781
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 100
print_debug_output = true
binary_media = binary_media
[]
[Executioner]
type = Transient
num_steps = 2000
[]
[TensorOutputs]
[xdmf2]
type = XDMFTensorOutput
buffer = 'rho u'
output_mode = 'Cell Cell'
enable_hdf5 = true
[]
[]
(test/tests/lbm/mixed_bcs_d3q27_reverse.i)
[Domain]
dim = 3
nx = 10
ny = 10
nz = 10
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q27]
type = LBMD3Q27
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_bounce_back]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type=LBMTensorBuffer
buffer_type = mv
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0001 0.0005 0.0'
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_f_bb]
type = LBMEquilibrium
buffer = f_bounce_back
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
add_body_force = true
body_force_x = 0.0001
[]
[]
[Boundary]
[right]
type = LBMFixedZerothOrderBC
buffer = f
f = f
value = 1.1
boundary = right
[]
[left]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = 0.0001
boundary = left
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = f_bounce_back
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = mixed_bcs_d3q27_reverse
csv = true
[]
(examples/lbm/Rayleigh-Benard/rayleigh-benard.i)
Nx = 400
Ny = 200
TH = 1.1
TC = 1.0
frequency = '${Nx}/10.0'
amplitude = '${Ny}/100.0'
[Domain]
dim = 2
nx = '${Nx}'
ny = '${Ny}'
xmax = '${Nx}'
ymax = '${Ny}'
device_names='cpu'
mesh_mode=DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
!include buffers.i
[TensorComputes]
#### Initialzie ####
[Initialize]
[density]
type = LBMConstantTensor
buffer = density
constants = 'rho0'
[]
[velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[temperature]
type = ParsedCompute
buffer = T
expression = 'a:=abs(y - sin(x / (${frequency} * pi)) * ${amplitude}) + y - sin(x / (${frequency} * pi)) * ${amplitude};
b:= a / (a + 1.0e-14);
${TC} * b - b *${TH} + ${TH}'
extra_symbols = true
[]
[equilibrium_fluid]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[equilibrium_fluid_total]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[equilibrium_fluid_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[equilibrium_temperature]
type = LBMEquilibrium
buffer = geq
bulk = T
velocity = velocity
[]
[equilibrium_temperature_total]
type = LBMEquilibrium
buffer = g
bulk = T
velocity = velocity
[]
[equilibrium_temperature_pc]
type = LBMEquilibrium
buffer = gpc
bulk = T
velocity = velocity
[]
[]
!include solve.i
!include boundary.i
[]
[TensorSolver]
type = LBMStream
buffer = 'f g'
f_old = 'fpc gpc'
root_compute = Residual
[]
[TensorOutputs]
[xdmf]
type = XDMFTensorOutput
buffer = 'T velocity density'
output_mode = 'Cell Cell Cell'
enable_hdf5 = true
[]
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'rho0 T_0 T_C T_H tau_f tau_T g'
scalar_constant_values = '1.0 1.05 1.0 1.1 0.7 0.7 0.0001'
substeps = 100
print_debug_output = true
[]
[Executioner]
type = Transient
num_steps = 10000
[]
(test/tests/lbm/phase_3D.i)
# Domain
Nx = 20
Ny = 20
Nz = 20
# Fluid properties
rho_l = 5.0
rho_g = 1.0
nu_l = 0.1
nu_g = 1.0
sigma = 0.2
# Phase field parameters
tau_h = 1.0
D = 4
[Domain]
dim = 3
nx = '${Nx}'
ny = '${Ny}'
nz = '${Nz}'
xmax = '${Nx}'
ymax = '${Ny}'
zmax = '${Nz}'
device_names='cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q27]
type = LBMD3Q27
[]
[]
[TensorBuffers]
# Macroscopic phase field variables
[phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
# Macroscopic hydrodynamic variables
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM phase field variabels
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM hydrodynamic variables
[fdummy]
type = LBMTensorBuffer
buffer_type = df
[]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[phi_init]
type = ParsedCompute
buffer = phi
extra_symbols = true
expression = '0.3333 + 0.01*sin((12.9898*x + 78.233*y + 43.12*z)*2*pi)'
[]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
# Phase field equilibrium distribution initialization
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_post_collision_init]
type = LBMPhaseEquilibrium
buffer = h_post_collision
phi = phi
velocity = velocity
[]
[h_init]
type = LBMPhaseEquilibrium
buffer = h
phi = phi
velocity = velocity
[]
# Hydrodynamic equilibrium distribution initialization
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
# Phase Field
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
# Hydrodynamics
[density]
type = ParsedCompute
buffer = rho
extra_symbols = true
expression = 'phi*(rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
[]
# Phase-field
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
# Hydrodynamics
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
extra_symbols = true
expression = '(phi*(nu_l - nu_g) + nu_g)/cs2+0.5'
constant_names = 'nu_l nu_g cs2'
constant_expressions = '${nu_l} ${nu_g} 0.3333'
inputs = phi
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[residual]
type = LBMComputeResidual
buffer = phi
speed = phi
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
[]
[Postprocessors]
[phi_min]
type = TensorExtremeValuePostprocessor
buffer = phi
value_type = MIN
[]
[phi_max]
type = TensorExtremeValuePostprocessor
buffer = phi
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = rho
value_type = MAX
[]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 5
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = phase_3D
csv = true
[]
(test/tests/lbm/convective_outflow_3d_back.i)
[Domain]
dim = 3
nx = 8
ny = 8
nz = 8
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[]
[TensorComputes]
[Initialize]
[initial_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[initial_velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0 0.0'
[]
[initial_feq]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[initial_f]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[initial_fpc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[collision]
type = LBMBGKCollision
buffer = fpc
f = f
feq = feq
tau0 = 1.0
[]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
[]
[]
[Boundary]
[front]
type = LBMNonEquilibriumExtrapolation
buffer = f
prescribe_type = velocity
ux = 0.0
uy = 0.0
uz = 0.005
order = first
boundary = front
[]
[back]
type = LBMConvectiveOutflow
buffer = f
f_old = f
convection_velocity = Uc
boundary = back
[]
[left]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = left
[]
[right]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = right
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = f
f_old = fpc
[]
[Problem]
type = LatticeBoltzmannProblem
scalar_constant_names = 'Uc'
scalar_constant_values = '0.005'
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[density_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = convective_outflow_3d_back
csv = true
[]
(examples/lbm/Phase-field/layered_poiseuille.i)
#
# Layered Poiseuille Flow
# PHYSICAL REVIEW E 97, 033309 (2018) - Section III.B
#
# Domain
Nx = 10
Ny = 400
# Fluid properties
rho_l = 1000.0
rho_g = 1.0
# nu_l = 0.1
# nu_g = 1.0
sigma = 0.001
mu_l = 100.0 # rho_l * nu_l
mu_g = 1.0 # rho_g * nu_g
# Phase field parameters
# M = 0.1
# cs2 = 0.333333333333
tau_h = 0.8 # 0.5 + '${M}' / '${cs2}'
D = 5
# Driving force: Gx = uc * (mu_l + mu_g) / h^2
# uc = 1e-4
# h = # '${Ny} / 2'
Gx = 2.53e-07 # '${uc} * (${mu_l} + ${mu_g}) / (${h}^2)'
[Domain]
dim = 2
nx = '${Nx}'
ny = '${Ny}'
xmax = '${Nx}'
ymax = '${Ny}'
device_names = 'cpu'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d2q9]
type = LBMD2Q9
[]
[]
[TensorBuffers]
# Macroscopic phase field variables
[phi]
type = LBMTensorBuffer
buffer_type = ms
file = phi_init.h5
[]
[grad_phi]
type = LBMTensorBuffer
buffer_type = mv
[]
[laplacian_phi]
type = LBMTensorBuffer
buffer_type = ms
[]
[mu]
type = LBMTensorBuffer
buffer_type = ms
[]
[forces]
type = LBMTensorBuffer
buffer_type = mv
[]
[body_force]
type = LBMTensorBuffer
buffer_type = mv
[]
# Macroscopic hydrodynamic variables
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[speed]
type = LBMTensorBuffer
buffer_type = ms
[]
[pressure]
type = LBMTensorBuffer
buffer_type = ms
[]
[rho]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM phase field variables
[h]
type = LBMTensorBuffer
buffer_type = df
[]
[h_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[h_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[relaxation_tensor]
type = LBMTensorBuffer
buffer_type = ms
[]
# LBM hydrodynamic variables
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[f_post_collision]
type = LBMTensorBuffer
buffer_type = df
[]
[f_eq]
type = LBMTensorBuffer
buffer_type = df
[]
[]
[TensorComputes/Initialize]
[grad_phi_init]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[rho_init]
type = ParsedCompute
buffer = rho
expression = 'phi * (rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[pressure_init]
type = LBMConstantTensor
buffer = pressure
constants = 0.3
[]
[body_force_init]
type = LBMConstantTensor
buffer = body_force
constants = '${Gx} 0.00'
[]
# Phase field equilibrium distribution initialization
[h_eq_init]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[h_post_collision_init]
type = LBMPhaseEquilibrium
buffer = h_post_collision
phi = phi
velocity = velocity
[]
[h_init]
type = LBMPhaseEquilibrium
buffer = h
phi = phi
velocity = velocity
[]
# Hydrodynamic equilibrium distribution initialization
[f_eq_init]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[f_post_collision_init]
type = ParsedCompute
buffer = f_post_collision
expression = 'f_eq'
inputs = f_eq
[]
[f_init]
type = ParsedCompute
buffer = f
expression = 'f_eq'
inputs = f_eq
[]
[]
[TensorComputes/Solve]
# Phase Field
[compute_phi]
type = LBMComputeDensity
buffer = phi
f = h
[]
[grad_phi]
type = LBMIsotropicGradient
buffer = grad_phi
scalar_field = phi
[]
[laplacian_phi]
type = LBMIsotropicLaplacian
buffer = laplacian_phi
scalar_field = phi
[]
[potential]
type = LBMComputeChemicalPotential
buffer = mu
phi = phi
laplacian_phi = laplacian_phi
thickness = D
sigma = sigma
[]
[compute_forces]
type = LBMComputeSurfaceForces
buffer = forces
chemical_potential = mu
grad_phi = grad_phi
[]
[add_body_force]
type = ParsedCompute
buffer = forces
expression = 'forces + body_force'
inputs = 'forces body_force'
[]
# Hydrodynamics
[density]
type = ParsedCompute
buffer = rho
expression = 'phi * (rho_l - rho_g) + rho_g'
constant_names = 'rho_l rho_g'
constant_expressions = '${rho_l} ${rho_g}'
inputs = phi
[]
[velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = rho
enable_forces = true
forces = forces
# add_body_force = true
# body_force_x = '${Gx}'
[]
# Phase-field
[h_eq]
type = LBMPhaseEquilibrium
buffer = h_eq
phi = phi
velocity = velocity
[]
[phase_collision]
type = LBMBGKCollision
buffer = h_post_collision
f = h
feq = h_eq
tau0 = tau_h
[]
[apply_forces_phase]
type = LBMAllenCahnSource
buffer = h_post_collision
phi = phi
velocity = velocity
grad_phi = grad_phi
tau = tau_h
thickness = D
[]
# Hydrodynamics
[relaxation_tensor]
type = ParsedCompute
buffer = relaxation_tensor
# Implements Eq 26: Sharp step-function for dynamic viscosity
expression = '(if(phi >= 0.5, mu_l, mu_g) / rho) / cs2 + 0.5'
constant_names = 'mu_l mu_g cs2'
constant_expressions = '${mu_l} ${mu_g} 0.333333333333'
inputs = 'phi rho'
[]
[pressure]
type = LBMPhaseFieldPressure
buffer = pressure
f = f
velocity = velocity
grad_phi = grad_phi
rho = rho
rho_l = '${rho_l}'
rho_g = '${rho_g}'
[]
[f_eq]
type = LBMPressureCorrectedEquilibrium
buffer = f_eq
rho = rho
velocity = velocity
pressure = pressure
[]
[collision]
type = LBMBGKCollision
buffer = f_post_collision
f = f
feq = f_eq
tau0 = 1.0
is_dynamic_relaxation = true
tau_tensor = relaxation_tensor
[]
[apply_forces_hydro]
type = LBMForceDistribution
buffer = f_post_collision
grad_phi = grad_phi
velocity = velocity
forces = forces
tau_tensor = relaxation_tensor
tau = 1.0
rho_l = '${rho_l}'
rho_g = '${rho_g}'
is_dynamic_relaxation = true
[]
[speed]
type = LBMComputeVelocityMagnitude
buffer = speed
velocity = velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
[TensorComputes/Boundary]
[top_fluid]
type = LBMBounceBack
buffer = f
f_old = f_post_collision
boundary = top
[]
[bottom_fluid]
type = LBMBounceBack
buffer = f
f_old = f_post_collision
boundary = bottom
[]
[top_phase]
type = LBMBounceBack
buffer = h
f_old = h_post_collision
boundary = top
[]
[bottom_phase]
type = LBMBounceBack
buffer = h
f_old = h_post_collision
boundary = bottom
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'h f'
f_old = 'h_post_collision f_post_collision'
root_compute = residual
[]
[Problem]
type = LatticeBoltzmannProblem
# Keep this low for this setup: high substeps with top/bottom bounce-back can blow up to NaN.
substeps = 100000
print_debug_output = true
scalar_constant_names = 'tau_h D sigma'
scalar_constant_values = '${tau_h} ${D} ${sigma}'
[]
[Executioner]
type = Transient
num_steps = 2
[]
[TensorOutputs]
[xdmf]
type = XDMFTensorOutput
buffer = 'phi velocity rho'
output_mode = 'Cell Cell Cell'
enable_hdf5 = true
transpose = false
[]
[]
(test/tests/lbm/dirichlet_box.i)
[Domain]
dim = 3
nx = 5
ny = 5
nz = 5
mesh_mode = DUMMY
parallel_mode = REAL_SPACE
periodic_directions = 'X Y Z'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
[density]
type=LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[]
[TensorComputes]
[Initialize]
[init_density]
type = LBMConstantTensor
buffer = density
constants = 1.0
[]
[equilibrium]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[non_equilibrium]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[post_collision_equilibrium]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[]
[Solve]
[density]
type = LBMComputeDensity
buffer = density
f = f
[]
[]
[Boundary]
[left]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
value = 1.1
boundary = left
[]
[right]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
value = 1.1
boundary = right
[]
[top]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
value = 1.1
boundary = top
[]
[bottom]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
value = 1.1
boundary = bottom
[]
[front]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
value = 1.1
boundary = front
[]
[back]
type = LBMDirichletBC
buffer = f
f_old = fpc
feq = feq
velocity = velocity
rho = density
value = 1.1
boundary = back
[]
[]
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 1
[]
[Postprocessors]
[velocity_min]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MIN
[]
[velocity_max]
type = TensorExtremeValuePostprocessor
buffer = velocity
value_type = MAX
[]
[density_min]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MIN
[]
[densty_max]
type = TensorExtremeValuePostprocessor
buffer = density
value_type = MAX
[]
[]
[Executioner]
type = Transient
num_steps = 5
[]
[Outputs]
file_base = dirichlet_box
csv = true
[]
(examples/lbm/Pebbles/pebbles.i)
[Domain]
dim = 3
nx = 240
ny = 50
nz = 50
xmax = 240
ymax = 50
zmax = 50
device_names='cpu'
# floating_precision = 'single'
parallel_mode = REAL_SPACE
periodic_directions = 'X Y'
[]
[Stencil]
[d3q19]
type = LBMD3Q19
[]
[]
[TensorBuffers]
# Density distribution functions
[f]
type = LBMTensorBuffer
buffer_type = df
[]
[feq]
type = LBMTensorBuffer
buffer_type = df
[]
[fpc]
type = LBMTensorBuffer
buffer_type = df
[]
# Temperature distribution functions
[g]
type = LBMTensorBuffer
buffer_type = df
[]
[geq]
type = LBMTensorBuffer
buffer_type = df
[]
[gpc]
type = LBMTensorBuffer
buffer_type = df
[]
# Fluid macroscopic variables: density and velocity
[density]
type = LBMTensorBuffer
buffer_type = ms
[]
[velocity]
type = LBMTensorBuffer
buffer_type = mv
[]
[speed]
type=LBMTensorBuffer
buffer_type = ms
[]
# Temperature macroscpic variables: temperature and 'velocity'
[T]
type = LBMTensorBuffer
buffer_type = ms
[]
# Forces
[F]
type = LBMTensorBuffer
buffer_type = mv
[]
# Simulation domain
[binary_media]
type = LBMTensorBuffer
buffer_type = ms
file = 'binary_media.h5'
is_integer = true
[]
[]
[TensorComputes]
#### Initialzie ####
[Initialize]
[density]
type = LBMConstantTensor
buffer = density
constants = 'rho0'
[]
[velocity]
type = LBMConstantTensor
buffer = velocity
constants = '0.0 0.0'
[]
[temperature]
type = LBMConstantTensor
buffer = T
constants = T_C
[]
[equilibrium_fluid]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[equilibrium_fluid_total]
type = LBMEquilibrium
buffer = f
bulk = density
velocity = velocity
[]
[equilibrium_fluid_pc]
type = LBMEquilibrium
buffer = fpc
bulk = density
velocity = velocity
[]
[equilibrium_temperature]
type = LBMEquilibrium
buffer = geq
bulk = T
velocity = velocity
[]
[equilibrium_temperature_total]
type = LBMEquilibrium
buffer = g
bulk = T
velocity = velocity
[]
[equilibrium_temperature_pc]
type = LBMEquilibrium
buffer = gpc
bulk = T
velocity = velocity
[]
# [t_wall_hot_init]
# type = LBMDirichletWallBC
# buffer = g
# f_old = gpc
# value = T_H
# velocity = velocity
# boundary = wall
# []
[]
#### Compute ####
[Solve]
# For temperature
[Temperature]
type = LBMComputeDensity
buffer = T
f = g
[]
# For fluid
[Fluid_density]
type = LBMComputeDensity
buffer = density
f = f
[]
[Fluid_velocity]
type = LBMComputeVelocity
buffer = velocity
f = f
rho = density
forces = F
enable_forces = true
[]
# For temperature
[Equilibrium_temperature]
type = LBMEquilibrium
buffer = geq
bulk = T
velocity = velocity
[]
[Collision_temperature]
type = LBMMRTCollision
buffer = gpc
f = g
feq = geq
tau0 = tau_T
[]
# For fluid
[Compute_forces]
type = LBMComputeForces
buffer = F
rho0 = 'rho0'
temperature = T
T0 = T_H
enable_buoyancy = true
gravity = g
gravity_direction=0
[]
[Equilibrium_fluid]
type = LBMEquilibrium
buffer = feq
bulk = density
velocity = velocity
[]
[Collision_fluid]
type = LBMMRTCollision
buffer = fpc
f = f
feq = feq
tau0 = tau_f
[]
[Apply_forces]
type = LBMApplyForces
buffer = fpc
velocity = velocity
rho = density
forces = F
tau0 = tau_f
[]
[speed]
type=LBMComputeVelocityMagnitude
buffer=speed
velocity=velocity
[]
[residual]
type = LBMComputeResidual
buffer = speed
speed = speed
[]
[]
#### Boundary ####
[Boundary]
##### for fluid
[inlet]
type = LBMFixedFirstOrderBC
buffer = f
f = f
value = u0
boundary = left
[]
[outlet]
type = LBMMicroscopicZeroGradientBC
buffer = f
boundary = right
[]
[top]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = top
# exclude_corners_x = true
[]
[bottom]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = bottom
# exclude_corners_x = true
[]
[front]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = front
# exclude_corners_x = true
[]
[back]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = back
# exclude_corners_x = true
[]
[wall]
type = LBMBounceBack
buffer = f
f_old = fpc
boundary = wall
[]
##### for temperature
[t_inlet]
type = LBMFixedZerothOrderBC
buffer = g
f = g
value = T_C
boundary = left
[]
[t_outlet]
type = LBMMicroscopicZeroGradientBC
buffer = g
boundary = right
[]
[t_top]
type = LBMBounceBack
buffer = g
f_old = gpc
boundary = top
[]
[t_bottom]
type = LBMBounceBack
buffer = g
f_old = gpc
boundary = bottom
[]
[t_front]
type = LBMBounceBack
buffer = g
f_old = gpc
boundary = front
[]
[t_back]
type = LBMBounceBack
buffer = g
f_old = gpc
boundary = back
[]
[t_wall_hot]
type = LBMDirichletBC
buffer = g
f_old = gpc
feq = geq
velocity = velocity
rho = T
value = 1.2
boundary = wall
[]
[]
[]
[TensorSolver]
type = LBMStream
buffer = 'f g'
f_old = 'fpc gpc'
root_compute = residual
[]
[Problem]
type = LatticeBoltzmannProblem
substeps = 20
scalar_constant_names = 'rho0 T_C T_H tau_f tau_T g u0'
scalar_constant_values = '1.0 1.0 1.2 0.9 0.9 0.001 0.001'
is_binary_media = true
binary_media = binary_media
[]
[Postprocessors]
[reynolds]
type = ComputeReynoldsNumber
buffer = speed
tau = tau_f
diameter = 15
[]
[]
[Executioner]
type = Transient
num_steps = 2000
[]
# [TensorOutputs]
# [xdmf2]
# type = XDMFTensorOutput
# buffer = 'binary_media'
# output_mode = 'Cell'
# enable_hdf5 = true
# []
# []
[TensorOutputs]
[xdmf2]
type = XDMFTensorOutput
buffer = 'T velocity density binary_media'
output_mode = 'Cell Cell Cell Cell'
enable_hdf5 = true
[]
[]