HFEMDirichletBC

Imposes the Dirichlet BC with HFEM.

Description

HFEMDirichletBC is used for imposing the Dirichlet boundary with HFEM (hybrid finite element method). A HFEMDirichletBC object is for $var element = document.getElementById("moose-equation-b386c470-0d8e-494d-a8ec-e78a9396ce57");katex.render("\\left( u^\\ast, \\lambda_D \\right)_{\\partial \\Omega_D} + \\left( \\lambda_D^\\ast, u - g \\right)_{\\partial \\Omega_D}", element, {displayMode:false,throwOnError:false});$ on the subset of the boundary denoted by $var element = document.getElementById("moose-equation-2c244b5c-1e44-4b04-962c-34e53fe9a4e2");katex.render("\\partial \\Omega_D", element, {displayMode:false,throwOnError:false});$ . Thus it requires the "variable" parameter for $var element = document.getElementById("moose-equation-302bda00-44ce-407f-bccb-fc9b44d0f2a3");katex.render("u", element, {displayMode:false,throwOnError:false});$ , the "lowerd_variable" parameter for $var element = document.getElementById("moose-equation-15e72358-ec75-4f76-a2d2-8d7fe5fb5047");katex.render("\\lambda_D", element, {displayMode:false,throwOnError:false});$ and the "value" corresponds to $var element = document.getElementById("moose-equation-8d55f58a-93a2-4ba9-80e1-e98b0383cf5b");katex.render("g", element, {displayMode:false,throwOnError:false});$ . Refer to DGKernels System for the full HFEM weak form for Poisson's equation.

Example Input Syntax

  [all]
    type = HFEMDirichletBC
    boundary = 'left right top bottom'
    variable = u
    lowerd_variable = lambdab
    uhat = uhat
  []

Input Parameters

boundaryThe list of boundary IDs from the mesh where this object applies
C++ Type:std::vector<BoundaryName>
Unit:(no unit assumed)
Controllable:No
Description:The list of boundary IDs from the mesh where this object applies
lowerd_variableLagrange multiplier
C++ Type:std::vector<VariableName>
Unit:(no unit assumed)
Controllable:No
Description:Lagrange multiplier
variableThe name of the variable that this residual object operates on
C++ Type:NonlinearVariableName
Unit:(no unit assumed)
Controllable:No
Description:The name of the variable that this residual object operates on

Required Parameters

displacementsThe displacements
C++ Type:std::vector<VariableName>
Unit:(no unit assumed)
Controllable:No
Description:The displacements
prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
uhatThe coupled variable
C++ Type:std::vector<VariableName>
Unit:(no unit assumed)
Controllable:No
Description:The coupled variable
use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
valueValue of the BC
C++ Type:Eigen::Matrix<double, -1, 1, 0, -1, 1>
Unit:(no unit assumed)
Controllable:No
Description:Value of the BC

Optional Parameters

absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution
C++ Type:std::vector<TagName>
Unit:(no unit assumed)
Controllable:No
Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution
extra_matrix_tagsThe extra tags for the matrices this Kernel should fill
C++ Type:std::vector<TagName>
Unit:(no unit assumed)
Controllable:No
Description:The extra tags for the matrices this Kernel should fill
extra_vector_tagsThe extra tags for the vectors this Kernel should fill
C++ Type:std::vector<TagName>
Unit:(no unit assumed)
Controllable:No
Description:The extra tags for the vectors this Kernel should fill
matrix_tagssystemThe tag for the matrices this Kernel should fill
Default:system
C++ Type:MultiMooseEnum
Unit:(no unit assumed)
Options:nontime, system
Controllable:No
Description:The tag for the matrices this Kernel should fill
vector_tagsnontimeThe tag for the vectors this Kernel should fill
Default:nontime
C++ Type:MultiMooseEnum
Unit:(no unit assumed)
Options:nontime, time
Controllable:No
Description:The tag for the vectors this Kernel should fill

Tagging Parameters

control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Unit:(no unit assumed)
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
diag_save_inThe name of auxiliary variables to save this BC's diagonal jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
C++ Type:std::vector<AuxVariableName>
Unit:(no unit assumed)
Controllable:No
Description:The name of auxiliary variables to save this BC's diagonal jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:Yes
Description:Set the enabled status of the MooseObject.
implicitTrueDetermines whether this object is calculated using an implicit or explicit form
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Determines whether this object is calculated using an implicit or explicit form
save_inThe name of auxiliary variables to save this BC's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
C++ Type:std::vector<AuxVariableName>
Unit:(no unit assumed)
Controllable:No
Description:The name of auxiliary variables to save this BC's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
seed0The seed for the master random number generator
Default:0
C++ Type:unsigned int
Unit:(no unit assumed)
Controllable:No
Description:The seed for the master random number generator
use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

Advanced Parameters

(moose/test/tests/kernels/hfem/dirichlet.i)

[Mesh]
  [square]
    type = GeneratedMeshGenerator
    nx = 3
    ny = 3
    dim = 2
  []
  build_all_side_lowerd_mesh = true
[]

[Variables]
  [u]
    order = THIRD
    family = MONOMIAL
    block = 0
  []
  [uhat]
    order = CONSTANT
    family = MONOMIAL
    block = BOUNDARY_SIDE_LOWERD_SUBDOMAIN
  []
  [lambda]
    order = CONSTANT
    family = MONOMIAL
    block = INTERNAL_SIDE_LOWERD_SUBDOMAIN
  []
  [lambdab]
    order = CONSTANT
    family = MONOMIAL
    block = BOUNDARY_SIDE_LOWERD_SUBDOMAIN
  []
[]

[AuxVariables]
  [v]
    order = CONSTANT
    family = MONOMIAL
    block = 0
    initial_condition = '1'
  []
[]

[Kernels]
  [diff]
    type = MatDiffusion
    variable = u
    diffusivity = '1'
    block = 0
  []
  [source]
    type = CoupledForce
    variable = u
    v = v
    coef = '1'
    block = 0
  []
  [reaction]
    type = Reaction
    variable = uhat
    rate = '1'
    block = BOUNDARY_SIDE_LOWERD_SUBDOMAIN
  []
  [uhat_coupled]
    type = CoupledForce
    variable = uhat
    block = BOUNDARY_SIDE_LOWERD_SUBDOMAIN
    v = lambdab
    coef = '1'
  []
[]

[DGKernels]
  [surface]
    type = HFEMDiffusion
    variable = u
    lowerd_variable = lambda
  []
[]

[BCs]
  [all]
    type = HFEMDirichletBC
    boundary = 'left right top bottom'
    variable = u
    lowerd_variable = lambdab
    uhat = uhat
  []
[]

[Postprocessors]
  [intu]
    type = ElementIntegralVariablePostprocessor
    variable = u
    block = 0
  []
  [lambdanorm]
    type = ElementL2Norm
    variable = lambda
    block = INTERNAL_SIDE_LOWERD_SUBDOMAIN
  []
[]

[Executioner]
  type = Steady
  solve_type = 'NEWTON'
  petsc_options_iname = '-pc_type -snes_linesearch_type -pc_factor_mat_solver_type'
  petsc_options_value = 'lu       basic                 mumps'
[]

[Outputs]
  [out]
    # we hide lambda because it may flip sign due to element
    # renumbering with distributed mesh
    type = Exodus
    hide = lambda
  []
[]

Description
Example Input Syntax
Input Parameters