MeshGeneratorMesh

construction:Undocumented Class

The MeshGeneratorMesh has not been documented. The content listed below should be used as a starting point for documenting the class, which includes the typical automatic documentation associated with a MooseObject; however, what is contained is ultimately determined by what is necessary to make the documentation clear for users.


# MeshGeneratorMesh

!syntax description /Mesh/MeshGeneratorMesh

## Overview

!! Replace these lines with information regarding the MeshGeneratorMesh object.

## Example Input File Syntax

!! Describe and include an example of how to use the MeshGeneratorMesh object.

!syntax parameters /Mesh/MeshGeneratorMesh

!syntax inputs /Mesh/MeshGeneratorMesh

!syntax children /Mesh/MeshGeneratorMesh

Mesh generated from parameters

Input Parameters

allow_renumberingTrueIf allow_renumbering=false, node and element numbers are kept fixed until deletion
Default:True
C++ Type:bool
Options:
Description:If allow_renumbering=false, node and element numbers are kept fixed until deletion
build_all_side_lowerd_meshFalseTrue to build the lower-dimensional mesh for all sides.
Default:False
C++ Type:bool
Options:
Description:True to build the lower-dimensional mesh for all sides.
final_generatorThe name of the mesh generator output to use for the final Mesh
C++ Type:std::string
Options:
Description:The name of the mesh generator output to use for the final Mesh
ghosting_patch_sizeThe number of nearest neighbors considered for ghosting purposes when 'iteration' patch update strategy is used. Default is 5 * patch_size.
C++ Type:unsigned int
Options:
Description:The number of nearest neighbors considered for ghosting purposes when 'iteration' patch update strategy is used. Default is 5 * patch_size.
max_leaf_size10The maximum number of points in each leaf of the KDTree used in the nearest neighbor search. As the leaf size becomes larger,KDTree construction becomes faster but the nearest neighbor searchbecomes slower.
Default:10
C++ Type:unsigned int
Options:
Description:The maximum number of points in each leaf of the KDTree used in the nearest neighbor search. As the leaf size becomes larger,KDTree construction becomes faster but the nearest neighbor searchbecomes slower.
parallel_typeDEFAULTDEFAULT: Use libMesh::ReplicatedMesh unless --distributed-mesh is specified on the command line REPLICATED: Always use libMesh::ReplicatedMesh DISTRIBUTED: Always use libMesh::DistributedMesh
Default:DEFAULT
C++ Type:MooseEnum
Options:DEFAULT, REPLICATED, DISTRIBUTED
Description:DEFAULT: Use libMesh::ReplicatedMesh unless --distributed-mesh is specified on the command line REPLICATED: Always use libMesh::ReplicatedMesh DISTRIBUTED: Always use libMesh::DistributedMesh

Optional Parameters

centroid_partitioner_directionSpecifies the sort direction if using the centroid partitioner. Available options: x, y, z, radial
C++ Type:MooseEnum
Options:x, y, z, radial
Description:Specifies the sort direction if using the centroid partitioner. Available options: x, y, z, radial
partitionerdefaultSpecifies a mesh partitioner to use when splitting the mesh for a parallel computation.
Default:default
C++ Type:MooseEnum
Options:default, metis, parmetis, linear, centroid, hilbert_sfc, morton_sfc
Description:Specifies a mesh partitioner to use when splitting the mesh for a parallel computation.

Partitioning Parameters

construct_node_list_from_side_listTrueWhether or not to generate nodesets from the sidesets (usually a good idea).
Default:True
C++ Type:bool
Options:
Description:Whether or not to generate nodesets from the sidesets (usually a good idea).
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.
dim1This is only required for certain mesh formats where the dimension of the mesh cannot be autodetected. In particular you must supply this for GMSH meshes. Note: This is completely ignored for ExodusII meshes!
Default:1
C++ Type:MooseEnum
Options:1, 2, 3
Description:This is only required for certain mesh formats where the dimension of the mesh cannot be autodetected. In particular you must supply this for GMSH meshes. Note: This is completely ignored for ExodusII meshes!
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Options:
Description:Set the enabled status of the MooseObject.
nemesisFalseIf nemesis=true and file=foo.e, actually reads foo.e.N.0, foo.e.N.1, ... foo.e.N.N-1, where N = # CPUs, with NemesisIO.
Default:False
C++ Type:bool
Options:
Description:If nemesis=true and file=foo.e, actually reads foo.e.N.0, foo.e.N.1, ... foo.e.N.N-1, where N = # CPUs, with NemesisIO.
patch_size40The number of nodes to consider in the NearestNode neighborhood.
Default:40
C++ Type:unsigned int
Options:
Description:The number of nodes to consider in the NearestNode neighborhood.
patch_update_strategyneverHow often to update the geometric search 'patch'. The default is to never update it (which is the most efficient but could be a problem with lots of relative motion). 'always' will update the patch for all secondary nodes at the beginning of every timestep which might be time consuming. 'auto' will attempt to determine at the start of which timesteps the patch for all secondary nodes needs to be updated automatically.'iteration' updates the patch at every nonlinear iteration for a subset of secondary nodes for which penetration is not detected. If there can be substantial relative motion between the primary and secondary surfaces during the nonlinear iterations within a timestep, it is advisable to use 'iteration' option to ensure accurate contact detection.
Default:never
C++ Type:MooseEnum
Options:never, always, auto, iteration
Description:How often to update the geometric search 'patch'. The default is to never update it (which is the most efficient but could be a problem with lots of relative motion). 'always' will update the patch for all secondary nodes at the beginning of every timestep which might be time consuming. 'auto' will attempt to determine at the start of which timesteps the patch for all secondary nodes needs to be updated automatically.'iteration' updates the patch at every nonlinear iteration for a subset of secondary nodes for which penetration is not detected. If there can be substantial relative motion between the primary and secondary surfaces during the nonlinear iterations within a timestep, it is advisable to use 'iteration' option to ensure accurate contact detection.

Advanced Parameters

Input Files

(modules/heat_conduction/test/tests/radiation_transfer_action/radiative_transfer_no_action.i)
(modules/heat_conduction/test/tests/radiation_transfer_action/radiative_transfer_action.i)
(test/tests/vectorpostprocessors/sideset_info/sideset_info.i)
(modules/heat_conduction/test/tests/postprocessors/convective_ht_side_integral.i)
(test/tests/auxkernels/current_boundary_id/current_boundary_id.i)
(modules/heat_conduction/test/tests/generate_radiation_patch/generate_radiation_patch.i)
(modules/heat_conduction/test/tests/generate_radiation_patch/generate_radiation_patch_grid.i)
(modules/heat_conduction/test/tests/gray_lambert_radiator/coupled_heat_conduction.i)
(test/tests/mesh/multi_elem_integers/multi_element_integer.i)
(modules/heat_conduction/test/tests/radiative_bcs/radiative_bc_cyl.i)
(modules/heat_conduction/test/tests/heat_conduction/min_gap/min_gap.i)

(modules/heat_conduction/test/tests/radiation_transfer_action/radiative_transfer_no_action.i)

[Problem]
  kernel_coverage_check = false
[]

[Mesh]
  type = MeshGeneratorMesh

  [./cmg]
    type = CartesianMeshGenerator
    dim = 2
    dx = '1 1.3 1.9'
    ix = '3 3 3'
    dy = '2 1.2 0.9'
    iy = '3 3 3'
    subdomain_id = '0 1 0
                    4 5 2
                    0 3 0'
  [../]

  [./inner_bottom]
    type = SideSetsBetweenSubdomainsGenerator
    input = cmg
    primary_block = 1
    paired_block = 5
    new_boundary = 'inner_bottom'
  [../]

  [./inner_left]
    type = SideSetsBetweenSubdomainsGenerator
    input = inner_bottom
    primary_block = 4
    paired_block = 5
    new_boundary = 'inner_left'
  [../]

  [./inner_right]
    type = SideSetsBetweenSubdomainsGenerator
    input = inner_left
    primary_block = 2
    paired_block = 5
    new_boundary = 'inner_right'
  [../]

  [./inner_top]
    type = SideSetsBetweenSubdomainsGenerator
    input = inner_right
    primary_block = 3
    paired_block = 5
    new_boundary = 'inner_top'
  [../]

  [./rename]
    type = RenameBlockGenerator
    old_block_id = '1 2 3 4'
    new_block_id = '0 0 0 0'
    input = inner_top
  [../]

  [./split_inner_bottom]
    type = PatchSidesetGenerator
    boundary = 4
    n_patches = 2
    partitioner = centroid
    centroid_partitioner_direction = x
    input = rename
  [../]

  [./split_inner_left]
    type = PatchSidesetGenerator
    boundary = 5
    n_patches = 2
    partitioner = centroid
    centroid_partitioner_direction = y
    input = split_inner_bottom
  [../]

  [./split_inner_right]
    type = PatchSidesetGenerator
    boundary = 6
    n_patches = 2
    partitioner = centroid
    centroid_partitioner_direction = y
    input = split_inner_left
  [../]

  [./split_inner_top]
    type = PatchSidesetGenerator
    boundary = 7
    n_patches = 3
    partitioner = centroid
    centroid_partitioner_direction = x
    input = split_inner_right
  [../]
[]

[Variables]
  [./temperature]
    block = 0
  [../]
[]

[Kernels]
  [./heat_conduction]
    type = HeatConduction
    variable = temperature
    block = 0
    diffusion_coefficient = 5
  [../]
[]

[UserObjects]
  [./gray_lambert]
    type = ViewFactorObjectSurfaceRadiation
    boundary = 'inner_bottom_0 inner_bottom_1
                inner_left_0 inner_left_1
                inner_right_0 inner_right_1
                inner_top_0 inner_top_1 inner_top_2'
    fixed_temperature_boundary = 'inner_bottom_0 inner_bottom_1'
    fixed_boundary_temperatures = '1200          1200'
    adiabatic_boundary = 'inner_top_0 inner_top_1 inner_top_2'
    emissivity = '0.9 0.9
                  0.8 0.8
                  0.4 0.4
                  1 1 1'
    temperature = temperature
    view_factor_object_name = view_factor
    execute_on = 'LINEAR TIMESTEP_END'
  [../]

  [./view_factor]
    type = UnobstructedPlanarViewFactor
    boundary = 'inner_bottom_0 inner_bottom_1
                inner_left_0 inner_left_1
                inner_right_0 inner_right_1
                inner_top_0 inner_top_1 inner_top_2'
    normalize_view_factor = true
    execute_on = 'INITIAL'
  [../]
[]

[BCs]
  [./left]
    type = DirichletBC
    variable = temperature
    boundary = left
    value = 600
  [../]

  [./right]
    type = DirichletBC
    variable = temperature
    boundary = right
    value = 300
  [../]

  [./radiation]
    type = GrayLambertNeumannBC
    variable = temperature
    surface_radiation_object_name = gray_lambert
    boundary = 'inner_left_0 inner_left_1
                inner_right_0 inner_right_1'
  [../]
[]

[Postprocessors]
  [./average_T_inner_right]
    type = SideAverageValue
    variable = temperature
    boundary = inner_right
  [../]
[]

[Executioner]
  type = Steady
[]

[Outputs]
  exodus = true
[]

(modules/heat_conduction/test/tests/radiation_transfer_action/radiative_transfer_action.i)

[Problem]
  kernel_coverage_check = false
[]

[Mesh]
  type = MeshGeneratorMesh

  [./cmg]
    type = CartesianMeshGenerator
    dim = 2
    dx = '1 1.3 1.9'
    ix = '3 3 3'
    dy = '2 1.2 0.9'
    iy = '3 3 3'
    subdomain_id = '0 1 0
                    4 5 2
                    0 3 0'
  [../]

  [./inner_bottom]
    type = SideSetsBetweenSubdomainsGenerator
    input = cmg
    primary_block = 1
    paired_block = 5
    new_boundary = 'inner_bottom'
  [../]

  [./inner_left]
    type = SideSetsBetweenSubdomainsGenerator
    input = inner_bottom
    primary_block = 4
    paired_block = 5
    new_boundary = 'inner_left'
  [../]

  [./inner_right]
    type = SideSetsBetweenSubdomainsGenerator
    input = inner_left
    primary_block = 2
    paired_block = 5
    new_boundary = 'inner_right'
  [../]

  [./inner_top]
    type = SideSetsBetweenSubdomainsGenerator
    input = inner_right
    primary_block = 3
    paired_block = 5
    new_boundary = 'inner_top'
  [../]

  [./rename]
    type = RenameBlockGenerator
    old_block_id = '1 2 3 4'
    new_block_id = '0 0 0 0'
    input = inner_top
  [../]
[]

[Variables]
  [./temperature]
    block = 0
  [../]
[]

[Kernels]
  [./heat_conduction]
    type = HeatConduction
    variable = temperature
    block = 0
    diffusion_coefficient = 5
  [../]
[]

[GrayDiffuseRadiation]
  [./cavity]
    boundary = '4 5 6 7'
    emissivity = '0.9 0.8 0.4 1'
    n_patches = '2 2 2 3'
    partitioners = 'centroid centroid centroid centroid'
    centroid_partitioner_directions = 'x y y x'
    temperature = temperature
    adiabatic_boundary = '7'
    fixed_temperature_boundary = '4'
    fixed_boundary_temperatures = '1200'
    view_factor_calculator = analytical
  [../]
[]

[BCs]
  [./left]
    type = DirichletBC
    variable = temperature
    boundary = left
    value = 600
  [../]

  [./right]
    type = DirichletBC
    variable = temperature
    boundary = right
    value = 300
  [../]
[]

[Postprocessors]
  [./average_T_inner_right]
    type = SideAverageValue
    variable = temperature
    boundary = inner_right
  [../]
[]

[Executioner]
  type = Steady
[]

[Outputs]
  exodus = true
[]

(test/tests/vectorpostprocessors/sideset_info/sideset_info.i)

[Mesh]
  type = MeshGeneratorMesh

  [./uniform]
    type = GeneratedMeshGenerator
    dim = 2
    xmin = 0
    xmax = 1
    nx = 8
    ymin = -0.4
    ymax = 10.4
    ny = 5
  [../]
[]

[Variables]
  [./u]
    order = FIRST
    family = LAGRANGE
  [../]
[]

[Kernels]
  [./diff]
    type = Diffusion
    variable = u
  [../]
[]

[BCs]
  active = 'left right'

  [./left]
    type = DirichletBC
    variable = u
    boundary = 1
    value = 0
  [../]

  [./right]
    type = DirichletBC
    variable = u
    boundary = 2
    value = 1
  [../]
[]

[VectorPostprocessors]
  [./side_info]
    type = SidesetInfoVectorPostprocessor
    boundary = 'left right bottom'
    meta_data_types = 'centroid min max area'
  [../]
[]

[Executioner]
  type = Steady
[]

[Outputs]
  file_base = out
  csv = true
[]

(modules/heat_conduction/test/tests/postprocessors/convective_ht_side_integral.i)

[Mesh]
  type = MeshGeneratorMesh

  [./cartesian]
    type = CartesianMeshGenerator
    dim = 2
    dx = '0.45 0.1 0.45'
    ix = '5 1 5'
    dy = '0.45 0.1 0.45'
    iy = '5 1 5'
    subdomain_id = '1 1 1
                    1 2 1
                    1 1 1'
  [../]

  [./add_iss_1]
    type = SideSetsBetweenSubdomainsGenerator
    primary_block = 1
    paired_block = 2
    new_boundary = 'interface'
    input = cartesian
  [../]

  [./block_deleter]
    type = BlockDeletionGenerator
    block = 2
    input = add_iss_1
  [../]
[]

[Variables]
  [./temperature]
    initial_condition = 300
  [../]
[]

[AuxVariables]
  [./channel_T]
    family = MONOMIAL
    order = CONSTANT
    initial_condition = 400
  [../]

  [./channel_Hw]
    family = MONOMIAL
    order = CONSTANT
    initial_condition = 1000
  [../]
[]

[Kernels]
  [./graphite_diffusion]
    type = HeatConduction
    variable = temperature
    diffusion_coefficient = 'k_s'
  [../]
[]

[BCs]
  ## boundary conditions for the thm channels in the reflector
  [./channel_heat_transfer]
    type = CoupledConvectiveHeatFluxBC
    variable = temperature
    htc = channel_Hw
    T_infinity = channel_T
    boundary = 'interface'
  [../]

  # hot boundary on the left
  [./left]
    type = DirichletBC
    variable = temperature
    value = 1000
    boundary = 'left'
  [../]

  # cool boundary on the right
  [./right]
    type = DirichletBC
    variable = temperature
    value = 300
    boundary = 'right'
  [../]
[]

[Materials]
  [./thermal]
    type = GenericConstantMaterial
    prop_names = 'k_s'
    prop_values = '12'
  [../]

  [./htc_material]
    type = GenericConstantMaterial
    prop_names = 'alpha_wall'
    prop_values = '1000'
  [../]

  [./tfluid_mat]
    type = PiecewiseLinearInterpolationMaterial
    property = tfluid_mat
    variable = channel_T
    x = '400 500'
    y = '400 500'
  [../]
[]

[Postprocessors]
  [./Qw1]
    type = ConvectiveHeatTransferSideIntegral
    T_fluid_var = channel_T
    htc_var = channel_Hw
    T_solid = temperature
    boundary = interface
  [../]

  [./Qw2]
    type = ConvectiveHeatTransferSideIntegral
    T_fluid_var = channel_T
    htc = alpha_wall
    T_solid = temperature
    boundary = interface
  [../]

  [./Qw3]
    type = ConvectiveHeatTransferSideIntegral
    T_fluid = tfluid_mat
    htc = alpha_wall
    T_solid = temperature
    boundary = interface
  [../]
[]

[Executioner]
  type = Steady
[]

[Outputs]
  csv = true
[]

(test/tests/auxkernels/current_boundary_id/current_boundary_id.i)

#
# This is used to create the mesh but it does not work with --distributed-mesh flag
# and the parallel test bombs.
#
#[Mesh]
#  type = MeshGeneratorMesh
#
#  [./cartesian]
#    type = CartesianMeshGenerator
#    dim = 2
#    dx = '1 1'
#    ix = '10 10'
#    dy = '1'
#    iy = '10'
#    subdomain_id = '1 2'
#  [../]
#
#  [./interior_bc]
#    type = SideSetsBetweenSubdomainsGenerator
#    primary_block = 1
#    paired_block = 2
#    new_boundary = 12
#    input = cartesian
#  [../]
#[]

[Mesh]
  type = FileMesh
  file = current_boundary_id_in.e
[]

[Problem]
  kernel_coverage_check = false
[]

[Variables]
  [./u]
  [../]
[]

[Executioner]
  type = Steady
[]

[AuxVariables]
  [./id1]
    family = MONOMIAL
    order = CONSTANT
  []

  [./id2]
    family = MONOMIAL
    order = CONSTANT
  []
[]

[AuxKernels]
  [./id1]
    type = BIDAux
    variable = id1
    boundary = 'top'
  [../]

  [./id2]
    type = BIDAux
    variable = id2
    boundary = '12'
  [../]
[]



[Outputs]
  exodus = true
[]

(modules/heat_conduction/test/tests/generate_radiation_patch/generate_radiation_patch.i)

[Mesh]
  type = MeshGeneratorMesh

  [cmg]
    type = GeneratedMeshGenerator
    dim = 3
    xmin = 0
    xmax = 1
    nx = 25
    ymin = 0
    ymax = 1
    ny = 25
    zmin = 0
    zmax = 1
    nz = 25
  []

  [patch]
    type = PatchSidesetGenerator
    boundary = 0
    n_patches = 10
    input = cmg
  []
[]

(modules/heat_conduction/test/tests/generate_radiation_patch/generate_radiation_patch_grid.i)

[Mesh]
  type = MeshGeneratorMesh

  [cmg]
    type = GeneratedMeshGenerator
    dim = 3
    xmin = 0
    xmax = 3
    nx = 25
    ymin = 0
    ymax = 2
    ny = 25
    zmin = 0
    zmax = 4
    nz = 25
  []

  [patch]
    type = PatchSidesetGenerator
    boundary = back
    n_patches = 19
    input = cmg
    partitioner = grid
  []
[]

(modules/heat_conduction/test/tests/gray_lambert_radiator/coupled_heat_conduction.i)

[Problem]
  kernel_coverage_check = false
[]

[Mesh]
  type = MeshGeneratorMesh

  [./cartesian]
    type = CartesianMeshGenerator
    dim = 2
    dx = '1 1 1'
    ix = '2 2 2'
    dy = '5'
    iy = '10'
    subdomain_id = '1 2 3'
  [../]

  [./break_sides]
    type = BreakBoundaryOnSubdomainGenerator
    boundaries = 'bottom top'
    input = cartesian
  [../]

  [./left_interior]
    type = SideSetsBetweenSubdomainsGenerator
    primary_block = 1
    paired_block = 2
    new_boundary = left_interior
    input = break_sides
  [../]

  [./right_interior]
    type = SideSetsBetweenSubdomainsGenerator
    primary_block = 3
    paired_block = 2
    new_boundary = right_interior
    input = left_interior
  [../]
  [./rename]
    type = RenameBlockGenerator
    input = right_interior
    old_block_id = '1 2 3'
    new_block_id = '1 4 3'
  [../]
[]


[Variables]
  [./temperature]
    initial_condition = 300
    block = '1 3'
  [../]
[]

[Kernels]
  [./heat_conduction]
    type = HeatConduction
    variable = temperature
    diffusion_coefficient = 1
    block = '1 3'
  [../]
[]

[UserObjects]
  [./cavity_radiation]
    type = ConstantViewFactorSurfaceRadiation
    boundary = 'left_interior right_interior bottom_to_2 top_to_2'
    temperature = temperature
    emissivity = '0.8 0.8 0.8 0.8'
    adiabatic_boundary = 'bottom_to_2 top_to_2'
    # these view factors are made up to exactly balance energy
    # transfer through the cavity
    view_factors = '0    0.8 0.1 0.1;
                    0.8  0   0.1 0.1;
                    0.45 0.45  0 0.1;
                    0.45 0.45 0.1  0'
    execute_on = 'INITIAL LINEAR TIMESTEP_END'
  [../]
[]

[BCs]
  [./bottom_left]
    type = DirichletBC
    preset = false
    variable = temperature
    boundary = bottom_to_1
    value = 1500
  [../]

  [./top_right]
    type = DirichletBC
    preset = false
    variable = temperature
    boundary = top_to_3
    value = 300
  [../]

  [./radiation]
    type = GrayLambertNeumannBC
    variable = temperature
    reconstruct_emission = false
    surface_radiation_object_name = cavity_radiation
    boundary = 'left_interior right_interior'
  [../]
[]

[Postprocessors]
  [./qdot_left]
    type = GrayLambertSurfaceRadiationPP
    boundary = left_interior
    surface_radiation_object_name = cavity_radiation
    return_type = HEAT_FLUX_DENSITY
  [../]

  [./qdot_right]
    type = GrayLambertSurfaceRadiationPP
    boundary = right_interior
    surface_radiation_object_name = cavity_radiation
    return_type = HEAT_FLUX_DENSITY
  [../]

  [./qdot_top]
    type = GrayLambertSurfaceRadiationPP
    boundary = top_to_2
    surface_radiation_object_name = cavity_radiation
    return_type = HEAT_FLUX_DENSITY
  [../]

  [./qdot_bottom]
    type = GrayLambertSurfaceRadiationPP
    boundary = bottom_to_2
    surface_radiation_object_name = cavity_radiation
    return_type = HEAT_FLUX_DENSITY
  [../]
[]

[Executioner]
  type = Steady
[]

[Outputs]
  exodus = true
[]

(test/tests/mesh/multi_elem_integers/multi_element_integer.i)

[Mesh]
  type = MeshGeneratorMesh
  parallel_type = 'replicated'

  [gmg1]
    type = GeneratedMeshGenerator
    dim = 2
    xmin = 0
    xmax = 1
    ymin = 0
    ymax = 1
    nx = 5
    ny = 5
    extra_element_integers = 'material_id'
  []
  [gmg2]
    type = GeneratedMeshGenerator
    dim = 2
    xmin = 1
    xmax = 2
    ymin = 0
    ymax = 1
    nx = 5
    ny = 5
    extra_element_integers = 'source_id'
  []
  [stitcher]
    type = StitchedMeshGenerator
    inputs = 'gmg1 gmg2'
    stitch_boundaries_pairs = 'right left'
  []
  [set_material_id0]
    type = SubdomainBoundingBoxGenerator
    input = stitcher
    bottom_left = '0 0 0'
    top_right = '1 1 0'
    block_id = 1
    location = INSIDE
    integer_name = material_id
  []
  [set_material_id1]
    type = SubdomainBoundingBoxGenerator
    input = set_material_id0
    bottom_left = '1 0 0'
    top_right = '2 1 0'
    block_id = 2
    location = INSIDE
    integer_name = material_id
  []
  [set_material_id2]
    type = SubdomainBoundingBoxGenerator
    input = set_material_id1
    bottom_left = '0 0 0'
    top_right = '1 1 0'
    block_id = 3
    location = INSIDE
    integer_name = source_id
  []
  [set_material_id3]
    type = SubdomainBoundingBoxGenerator
    input = set_material_id2
    bottom_left = '1 0 0'
    top_right = '2 1 0'
    block_id = 4
    location = INSIDE
    integer_name = source_id
  []
[]

[AuxVariables]
  [id1]
    family = MONOMIAL
    order = CONSTANT
  []
  [id2]
    family = MONOMIAL
    order = CONSTANT
  []
[]

[AuxKernels]
  [id1]
    type = ElementIntegerAux
    variable = id1
    integer_names = material_id
  []
  [id2]
    type = ElementIntegerAux
    variable = id2
    integer_names = source_id
  []
[]

[Problem]
  solve = false
[]

[Executioner]
  type = Steady
[]

[Outputs]
  exodus = true
[]

(modules/heat_conduction/test/tests/radiative_bcs/radiative_bc_cyl.i)

#
# Thin cylindrical shell with very high thermal conductivity
# so that temperature is almost uniform at 500 K. Radiative
# boundary conditions is applied. Heat flux out of boundary
# 'right' should be 3723.36; this is approached as the mesh
# is refined
#

[Mesh]
  type = MeshGeneratorMesh
  [./cartesian]
    type = CartesianMeshGenerator
    dim = 2
    dx = '1 1'
    ix = '1 10'
    dy = '1 1'
    subdomain_id = '1 2 1 2'
  [../]

  [./remove_1]
    type = BlockDeletionGenerator
    block = 1
    input = cartesian
  [../]

  [./readd_left]
    type = ParsedGenerateSideset
    combinatorial_geometry = 'abs(x - 1) < 1e-4'
    new_sideset_name = left
    input = remove_1
  [../]
[]

[Problem]
  coord_type = RZ
[]

[Variables]
  [./temp]
    initial_condition = 800.0
  [../]
[]

[Kernels]
  [./heat]
    type = HeatConduction
    variable = temp
  [../]
[]

[BCs]
  [./lefttemp]
    type = DirichletBC
    boundary = left
    variable = temp
    value = 800
  [../]

  [./radiative_bc]
    type = InfiniteCylinderRadiativeBC
    boundary = right
    variable = temp
    boundary_radius = 2
    boundary_emissivity = 0.2
    cylinder_radius = 3
    cylinder_emissivity = 0.7
    Tinfinity = 500
  [../]
[]

[Materials]
  [./density]
    type = GenericConstantMaterial
    prop_names = 'density  thermal_conductivity'
    prop_values = '1 1.0e5'
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Executioner]
  type = Steady
  petsc_options = '-snes_converged_reason'
  line_search = none
  nl_rel_tol = 1e-6
  nl_abs_tol = 1e-7
[]

[Postprocessors]
  [./right]
    type = SideFluxAverage
    variable = temp
    boundary = right
    diffusivity = thermal_conductivity
  [../]

  [./min_temp]
    type = ElementExtremeValue
    variable = temp
    value_type = min
  [../]

  [./max_temp]
    type = ElementExtremeValue
    variable = temp
    value_type = max
  [../]
[]

[Outputs]
  csv = true
[]

(modules/heat_conduction/test/tests/heat_conduction/min_gap/min_gap.i)

[Mesh]
  type = MeshGeneratorMesh
  displacements = 'disp_x disp_y'
  [./left_gen]
    type = GeneratedMeshGenerator
    dim = 2
    nx = 2
    ny = 3
    xmin = -3
    xmax = 0
    ymin = -5
    ymax = 5
  [../]
  [./right_gen]
    type = GeneratedMeshGenerator
    dim = 2
    nx = 2
    ny = 3
    xmin = 3
    xmax = 6
    ymin = -5
    ymax = 5
  [../]

  [./left_and_right]
    type = MeshCollectionGenerator
    inputs = 'left_gen right_gen'
  [../]
  [./leftleft]
    type = SideSetsAroundSubdomainGenerator
    block = 0
    new_boundary = leftleft
    normal = '-1 0 0'
    input = left_and_right
  [../]
  [./leftright]
    type = SideSetsAroundSubdomainGenerator
    block = 0
    new_boundary = leftright
    normal = '1 0 0'
    input = leftleft
  [../]

  [./right]
    type = SubdomainBoundingBoxGenerator
    top_right = '6 5 0'
    bottom_left = '3 -5 0'
    block_id = 1
    input = leftright
  [../]

  [./rightleft]
    type = SideSetsAroundSubdomainGenerator
    block = 1
    new_boundary = rightleft
    normal = '-1 0 0'
    input = right
  [../]
  [./rightright]
    type = SideSetsAroundSubdomainGenerator
    block = 1
    new_boundary = rightright
    normal = '1 0 0'
    input = rightleft
  [../]
[]

[Variables]
  [./temp]
  [../]
[]

[AuxVariables]
  [./disp_x]
  [../]
  [./disp_y]
  [../]
  [./gap_conductance]
    order = CONSTANT
    family = MONOMIAL
  [../]
[]

[Functions]
  [./disp_x]
    type = ParsedFunction
    value = -3+t
  [../]
  [./left_temp]
    type = ParsedFunction
    value = 1000+t
  [../]
[]

[Kernels]
  [./hc]
    type = HeatConduction
    variable = temp
  [../]
[]

[AuxKernels]
  [./disp_x]
    type = FunctionAux
    block = 1
    variable = disp_x
    function = disp_x
    execute_on = 'INITIAL TIMESTEP_END'
  [../]
  [./gap_conductivity]
    type = MaterialRealAux
    boundary = leftright
    property = gap_conductance
    variable = gap_conductance
    execute_on = 'INITIAL TIMESTEP_END'
  [../]
[]

[BCs]
  [./left]
    type = FunctionDirichletBC
    variable = temp
    boundary = leftleft
    function = left_temp
  [../]
  [./right]
    type = DirichletBC
    variable = temp
    boundary = rightright
    value = 400
  [../]
[]

[ThermalContact]
  [./left_to_right]
    secondary = leftright
    quadrature = true
    primary = rightleft
    variable = temp
    min_gap = 1
    min_gap_order = 1
    emissivity_primary = 0
    emissivity_secondary = 0
    type = GapHeatTransfer
  [../]
[]

[Materials]
  [./hcm]
    type = HeatConductionMaterial
    block = '0 1'
    specific_heat = 1
    thermal_conductivity = 1
    use_displaced_mesh = true
  [../]
[]

[Postprocessors]
  [./gap_conductance]
    type = PointValue
    point = '0 0 0'
    variable = gap_conductance
  [../]
[]

[Executioner]
  type = Transient
  dt = 0.25
  end_time = 3.0
  solve_type = 'PJFNK'
[]

[Outputs]
  csv = true
  execute_on = 'TIMESTEP_END'
[]

Input Parameters
Input Files

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