BoundaryMarker

Marks all elements with sides on a given boundary for refinement/coarsening

Description

The BoundaryMarker is a stand-alone marker that marks all elements either directly or within a given "distance" to a boundary.

warning:Distributed Mesh

Currently this Marker may give inaccurate results when using distributed meshes while also supplying the "distance" parameter. Parts of the boundary on different processors will not affect the distance calculation. Marking elements directly adjacent to a boundary will always work.

note:Performance

This marker is not yet optimized for scalability when using the "distance" parameter and will have a complexity of order O(N*M), where N is the total number of elements in the mesh, and M is the number of elements adjacent to the boundary.

Example Input Syntax

[Adaptivity]
  [Markers]
    [boundary]
      type = BoundaryMarker
      next_to = right
      mark = refine
    []
  []
  initial_marker = boundary
  initial_steps = 2
[]

[Adaptivity]
  [Markers]
    [boundary]
      type = BoundaryMarker
      next_to = right
      distance = 0.35
      mark = refine
    []
  []
  initial_marker = boundary
  initial_steps = 1
[]

Input Parameters

markHow to mark elements adjacent to the boundary.
C++ Type:MooseEnum
Options:DONT_MARK, COARSEN, DO_NOTHING, REFINE
Controllable:No
Description:How to mark elements adjacent to the boundary.
next_toBoundaries to refine elements along
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:Boundaries to refine elements along

Required Parameters

blockThe list of blocks (ids or names) that this object will be applied
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:The list of blocks (ids or names) that this object will be applied
distance0Distance from the boundary to refine within
Default:0
C++ Type:double
Controllable:No
Description:Distance from the boundary to refine within

Optional 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.
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:No
Description:Set the enabled status of the MooseObject.
outputsVector of output names where you would like to restrict the output of variables(s) associated with this object
C++ Type:std::vector<OutputName>
Controllable:No
Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object

Advanced Parameters

(moose/test/tests/markers/boundary_marker/adjacent.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 5
  ny = 5
[]

[Variables]
  [u]
  []
[]

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

[BCs]
  [left]
    type = DirichletBC
    variable = u
    boundary = left
    value = 0
  []
  [right]
    type = DirichletBC
    variable = u
    boundary = right
    value = 1
  []
[]

[Executioner]
  type = Steady

  solve_type = 'PJFNK'

  petsc_options_iname = '-pc_type -pc_hypre_type'
  petsc_options_value = 'hypre boomeramg'
[]

# Mesh Marker System
[Adaptivity]
  [Markers]
    [boundary]
      type = BoundaryMarker
      next_to = right
      mark = refine
    []
  []
  initial_marker = boundary
  initial_steps = 2
[]

[Outputs]
  exodus = true
[]

(moose/test/tests/markers/boundary_marker/distance.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 5
  ny = 5
[]

[Variables]
  [u]
  []
[]

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

[BCs]
  [left]
    type = DirichletBC
    variable = u
    boundary = left
    value = 0
  []
  [right]
    type = DirichletBC
    variable = u
    boundary = right
    value = 1
  []
[]

[Executioner]
  type = Steady

  solve_type = 'PJFNK'

  petsc_options_iname = '-pc_type -pc_hypre_type'
  petsc_options_value = 'hypre boomeramg'
[]

# Mesh Marker System
[Adaptivity]
  [Markers]
    [boundary]
      type = BoundaryMarker
      next_to = right
      distance = 0.35
      mark = refine
    []
  []
  initial_marker = boundary
  initial_steps = 1
[]

[Outputs]
  exodus = true
[]