CutSubdomainIDAux

Fill the elemental variable with CutSubdomainID

Overview

To allow using XFEM to model interfaces between materials, the XFEM system uses cut subdomain IDs to denote the subset of a standard MOOSE subdomain (element block) that a material point belongs to. CutSubdomainIDAux outputs the value of the cut subdomain ID for each element.

note

Cut subdomain IDs are special IDs used only for XFEM that are different from the libMesh subdomain IDs. Although CutElementSubdomainModifier could be used to assign cut subdomain IDs as element subdomain IDs.

Example Input File Syntax

Input Parameters

cutThe geometric cut userobject that assigns the CutSubdomainID
C++ Type:UserObjectName
Options:
Description:The geometric cut userobject that assigns the CutSubdomainID
variableThe name of the variable that this object applies to
C++ Type:AuxVariableName
Options:
Description:The name of the variable that this object applies to

Required Parameters

blockThe list of block ids (SubdomainID) that this object will be applied
C++ Type:std::vector<SubdomainName>
Options:
Description:The list of block ids (SubdomainID) that this object will be applied
boundaryThe list of boundary IDs from the mesh where this boundary condition applies
C++ Type:std::vector<BoundaryName>
Options:
Description:The list of boundary IDs from the mesh where this boundary condition applies
check_boundary_restrictedTrueWhether to check for multiple element sides on the boundary in the case of a boundary restricted, element aux variable. Setting this to false will allow contribution to a single element's elemental value(s) from multiple boundary sides on the same element (example: when the restricted boundary exists on two or more sides of an element, such as at a corner of a mesh
Default:True
C++ Type:bool
Options:
Description:Whether to check for multiple element sides on the boundary in the case of a boundary restricted, element aux variable. Setting this to false will allow contribution to a single element's elemental value(s) from multiple boundary sides on the same element (example: when the restricted boundary exists on two or more sides of an element, such as at a corner of a mesh
execute_onLINEAR TIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM, PRE_DISPLACE.
Default:LINEAR TIMESTEP_END
C++ Type:ExecFlagEnum
Options:NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM, PRE_DISPLACE
Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM, PRE_DISPLACE.

Optional Parameters

control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Options:
Description:Adds user-defined labels for accessing object parameters via control logic.
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Options:
Description:Set the enabled status of the MooseObject.
seed0The seed for the master random number generator
Default:0
C++ Type:unsigned int
Options:
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
Options:
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

Input Files

(modules/xfem/test/tests/switching_material/two_cuts_stationary.i)
(modules/xfem/test/tests/switching_material/two_cuts_moving.i)
(modules/xfem/test/tests/switching_material/one_cut_moving.i)

(modules/xfem/test/tests/switching_material/two_cuts_stationary.i)

[Problem]
  solve = false
[]

[XFEM]
  qrule = volfrac
  output_cut_plane = true
[]

[UserObjects]
  [cut1]
    type = LevelSetCutUserObject
    level_set_var = phi1
    negative_id = 1
    positive_id = 33
    execute_on = NONE
  []
  [cut2]
    type = LevelSetCutUserObject
    level_set_var = phi2
    negative_id = 5
    positive_id = 16
    execute_on = NONE
  []
  [combo]
    type = ComboCutUserObject
    geometric_cut_userobjects = 'cut1 cut2'
    cut_subdomain_combinations = '1 5;
                                  1 16;
                                  33 5;
                                  33 16'
    cut_subdomains = '1 3 5 7'
  []
[]

[Mesh]
  [square]
    type = GeneratedMeshGenerator
    dim = 2
    nx = 5
    ny = 5
  []
[]

[AuxVariables]
  [phi1]
    [InitialCondition]
      type = FunctionIC
      function = 'x-0.213'
    []
  []
  [phi2]
    [InitialCondition]
      type = FunctionIC
      function = 'x-0.728'
    []
  []
  [cut1_id]
    order = CONSTANT
    family = MONOMIAL
  []
  [cut2_id]
    order = CONSTANT
    family = MONOMIAL
  []
  [combo_id]
    order = CONSTANT
    family = MONOMIAL
  []
[]

[AuxKernels]
  [cut1_id]
    type = CutSubdomainIDAux
    variable = cut1_id
    cut = cut1
  []
  [cut2_id]
    type = CutSubdomainIDAux
    variable = cut2_id
    cut = cut2
  []
  [combo_id]
    type = CutSubdomainIDAux
    variable = combo_id
    cut = combo
  []
[]

[Materials]
  [diffusivity_A]
    type = GenericConstantMaterial
    prop_names = 'A_D'
    prop_values = '5'
  []
  [diffusivity_B]
    type = GenericConstantMaterial
    prop_names = 'B_D'
    prop_values = '0.5'
  []
  [diffusivity_C]
    type = GenericConstantMaterial
    prop_names = 'C_D'
    prop_values = '12'
  []
  [diffusivity_D]
    type = GenericConstantMaterial
    prop_names = 'D_D'
    prop_values = '9'
  []
  [diff_combined]
    type = XFEMCutSwitchingMaterialReal
    cut_subdomain_ids = '1 3 5 7'
    base_names = 'A B C D'
    prop_name = D
    geometric_cut_userobject = combo
    outputs = 'exodus'
    output_properties = 'D'
  []
[]

[Executioner]
  type = Transient

  num_steps = 1

  max_xfem_update = 1
[]

[Outputs]
  exodus = true
[]

(modules/xfem/test/tests/switching_material/two_cuts_moving.i)

[Problem]
  solve = false
[]

[XFEM]
  qrule = volfrac
  output_cut_plane = true
[]

[UserObjects]
  [cut1]
    type = LevelSetCutUserObject
    level_set_var = phi1
    negative_id = 1
    positive_id = 33
    execute_on = NONE
  []
  [cut2]
    type = LevelSetCutUserObject
    level_set_var = phi2
    negative_id = 5
    positive_id = 16
    execute_on = NONE
  []
  [combo]
    type = ComboCutUserObject
    geometric_cut_userobjects = 'cut1 cut2'
    cut_subdomain_combinations = '1 5;
                                  1 16;
                                  33 5;
                                  33 16'
    cut_subdomains = '1 3 5 7'
    heal_always = true
  []
[]

[Mesh]
  [square]
    type = GeneratedMeshGenerator
    dim = 2
    nx = 5
    ny = 5
  []
[]

[AuxVariables]
  [phi1]
  []
  [phi2]
  []
  [cut1_id]
    order = CONSTANT
    family = MONOMIAL
  []
  [cut2_id]
    order = CONSTANT
    family = MONOMIAL
  []
  [combo_id]
    order = CONSTANT
    family = MONOMIAL
  []
[]

[AuxKernels]
  [phi1]
    type = FunctionAux
    variable = phi1
    function = 'x-0.213-t'
    execute_on = 'INITIAL TIMESTEP_BEGIN'
  []
  [phi2]
    type = FunctionAux
    variable = phi2
    function = 'x-0.728+t'
    execute_on = 'INITIAL TIMESTEP_BEGIN'
  []
  [cut1_id]
    type = CutSubdomainIDAux
    variable = cut1_id
    cut = cut1
  []
  [cut2_id]
    type = CutSubdomainIDAux
    variable = cut2_id
    cut = cut2
  []
  [combo_id]
    type = CutSubdomainIDAux
    variable = combo_id
    cut = combo
  []
[]

[Materials]
  [diffusivity_A]
    type = GenericConstantMaterial
    prop_names = 'A_D'
    prop_values = '5'
  []
  [diffusivity_B]
    type = GenericConstantMaterial
    prop_names = 'B_D'
    prop_values = '0.5'
  []
  [diffusivity_C]
    type = GenericConstantMaterial
    prop_names = 'C_D'
    prop_values = '12'
  []
  [diffusivity_D]
    type = GenericConstantMaterial
    prop_names = 'D_D'
    prop_values = '9'
  []
  [diff_combined]
    type = XFEMCutSwitchingMaterialReal
    cut_subdomain_ids = '1 3 5 7'
    base_names = 'A B C D'
    prop_name = D
    geometric_cut_userobject = combo
    outputs = 'exodus'
    output_properties = 'D'
  []
[]

[Executioner]
  type = Transient

  dt = 0.05
  num_steps = 2

  max_xfem_update = 1
[]

[Outputs]
  exodus = true
[]

(modules/xfem/test/tests/switching_material/one_cut_moving.i)

[Problem]
  solve = false
[]

[XFEM]
  qrule = volfrac
  output_cut_plane = true
[]

[UserObjects]
  [cut]
    type = LevelSetCutUserObject
    level_set_var = phi
    negative_id = 1
    positive_id = 33
    heal_always = true
  []
[]

[Mesh]
  [square]
    type = GeneratedMeshGenerator
    dim = 2
    nx = 5
    ny = 5
  []
[]

[AuxVariables]
  [phi]
  []
  [cut_id]
    order = CONSTANT
    family = MONOMIAL
  []
[]

[AuxKernels]
  [phi]
    type = FunctionAux
    variable = phi
    function = 'x-0.213-t'
    execute_on = 'INITIAL TIMESTEP_BEGIN'
  []
  [cut_id]
    type = CutSubdomainIDAux
    variable = cut_id
    cut = cut
  []
[]

[Materials]
  [diffusivity_A]
    type = GenericConstantMaterial
    prop_names = 'A_D'
    prop_values = '5'
  []
  [diffusivity_B]
    type = GenericConstantMaterial
    prop_names = 'B_D'
    prop_values = '0.5'
  []
  [diff_combined]
    type = XFEMCutSwitchingMaterialReal
    cut_subdomain_ids = '1 33'
    base_names = 'A B'
    prop_name = D
    geometric_cut_userobject = cut
    outputs = 'exodus'
    output_properties = 'D'
  []
[]

[Executioner]
  type = Transient

  dt = 0.25
  num_steps = 2

  max_xfem_update = 1
[]

[Outputs]
  exodus = true
[]

Overview
Example Input File Syntax
Input Parameters
Input Files

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