ErrorToleranceMarker

Coarsen or refine elements based on an absolute tolerance allowed from the supplied indicator.

Description

The ErrorTolerenceMarker requires an approximation of the error to be supplied via an Indicator. Using the measure of error an element is define for coarsening or refinement using a hard tolerances:

* Refine if the element error is greater than value supplied in "refine" input parameter. * Coarsen if the element error is less than value supplied in "coarsen" input parameter.

Example Input Syntax

[Adaptivity]
  [./Indicators]
    [./error]
      type = AnalyticalIndicator
      variable = u
      function = solution
    [../]
  [../]
  [./Markers]
    [./marker]
      type = ErrorToleranceMarker
      coarsen = 4e-9
      indicator = error
      refine = 1e-8
    [../]
  [../]
[]

Input Parameters

indicatorThe name of the Indicator that this Marker uses.
C++ Type:IndicatorName
Controllable:No
Description:The name of the Indicator that this Marker uses.

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
coarsen0Elements with error less than this will be coarsened.
Default:0
C++ Type:double
Controllable:No
Description:Elements with error less than this will be coarsened.
refine1.79769e+308Elements with error more than this will be refined.
Default:1.79769e+308
C++ Type:double
Controllable:No
Description:Elements with error more than this will be refined.

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/error_tolerance_marker/error_tolerance_marker_test.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 10
  ny = 10
  nz = 10
[]

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

[Functions]
  [./solution]
    type = ParsedFunction
    expression = (exp(x)-1)/(exp(1)-1)
  [../]
[]

[Kernels]
  [./diff]
    type = Diffusion
    variable = u
  [../]
  [./conv]
    type = Convection
    variable = u
    velocity = '1 0 0'
  [../]
[]

[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'
[]

[Adaptivity]
  [./Indicators]
    [./error]
      type = AnalyticalIndicator
      variable = u
      function = solution
    [../]
  [../]
  [./Markers]
    [./marker]
      type = ErrorToleranceMarker
      coarsen = 4e-9
      indicator = error
      refine = 1e-8
    [../]
  [../]
[]

[Outputs]
  exodus = true
[]