NearestPointIntegralVariablePostprocessor

The domain is virtually divided into a number of subdomains according to the nearest points provided by users. And then the variable integral is taken over each individual subdomain separately.

Compute element variable integrals for nearest-point based subdomains

Input Parameters

variableThe name of the variable that this object operates on
C++ Type:std::vector
Options:
Description:The name of the variable that this object operates on

Required Parameters

blockThe list of block ids (SubdomainID) that this object will be applied
C++ Type:std::vector
Options:
Description:The list of block ids (SubdomainID) that this object will be applied
contains_complete_historyFalseSet this flag to indicate that the values in all vectors declared by this VPP represent a time history (e.g. with each invocation, new values are added and old values are never removed). This changes the output so that only a single file is output and updated with each invocation
Default:False
C++ Type:bool
Options:
Description:Set this flag to indicate that the values in all vectors declared by this VPP represent a time history (e.g. with each invocation, new values are added and old values are never removed). This changes the output so that only a single file is output and updated with each invocation
execute_onTIMESTEP_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.
Default:TIMESTEP_END
C++ Type:ExecFlagEnum
Options:NONE INITIAL LINEAR NONLINEAR TIMESTEP_END TIMESTEP_BEGIN FINAL CUSTOM TRANSFER
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.
pointsComputations will be lumped into values at these points.
C++ Type:std::vector
Options:
Description:Computations will be lumped into values at these points.
points_fileA filename that should be looked in for points. Each set of 3 values in that file will represent a Point. This and 'points' cannot be both supplied.
C++ Type:FileName
Options:
Description:A filename that should be looked in for points. Each set of 3 values in that file will represent a Point. This and 'points' cannot be both supplied.

Optional Parameters

allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
Default:False
C++ Type:bool
Options:
Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector
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.
implicitTrueDetermines whether this object is calculated using an implicit or explicit form
Default:True
C++ Type:bool
Options:
Description:Determines whether this object is calculated using an implicit or explicit form
outputsVector of output names were you would like to restrict the output of variables(s) associated with this object
C++ Type:std::vector
Options:
Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object
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

test/tests/transfers/multiapp_conservative_transfer/master_userobject.i
test/tests/transfers/multiapp_conservative_transfer/master_nearest_point.i

test/tests/transfers/multiapp_conservative_transfer/master_userobject.i

[Mesh]
  type = GeneratedMesh
  dim = 3
  nx = 20
  ny = 20
  nz = 20
  # The MultiAppUserObjectTransfer object only works with ReplicatedMesh
  parallel_type = replicated
[]

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

[AuxVariables]
  [./multi_layered_average]
  [../]
  [./element_multi_layered_average]
    order = CONSTANT
    family = MONOMIAL
  [../]
[]

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

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

[Executioner]
  type = Transient
  num_steps = 1
  dt = 0.001 # This will be constrained by the multiapp

  solve_type = 'PJFNK'

  petsc_options_iname = '-pc_type -pc_hypre_type'
  petsc_options_value = 'hypre boomeramg'
  l_tol = 1e-8
  nl_rel_tol = 1e-10
[]


[Outputs]
  exodus = true
  csv = true
[]

[VectorPostprocessors]
  [to_nearest_point]
    type = NearestPointIntegralVariablePostprocessor
    variable = multi_layered_average
    points = '0.3 0.1 0.3 0.7 0.1 0.3'
    execute_on = 'transfer nonlinear TIMESTEP_END'
  []

  [to_nearest_point_element]
    type = NearestPointIntegralVariablePostprocessor
    variable = element_multi_layered_average
    points = '0.3 0.1 0.3 0.7 0.1 0.3'
    execute_on = 'transfer nonlinear TIMESTEP_END'
  []
[]

[MultiApps]
  [./sub_app]
    positions = '0.3 0.1 0.3 0.7 0.1 0.3'
    type = TransientMultiApp
    input_files = sub_userobject.i
    app_type = MooseTestApp
  [../]
[]

[Transfers]
  [./layered_transfer]
    direction = from_multiapp
    user_object = layered_average
    variable = multi_layered_average
    type = MultiAppUserObjectTransfer
    multi_app = sub_app

    from_postprocessors_to_be_preserved  = 'from_postprocessor'
    to_postprocessors_to_be_preserved  = 'to_nearest_point'
  [../]
  [./element_layered_transfer]
    direction = from_multiapp
    user_object = layered_average
    variable = element_multi_layered_average
    type = MultiAppUserObjectTransfer
    multi_app = sub_app

    from_postprocessors_to_be_preserved  = 'from_postprocessor'
    to_postprocessors_to_be_preserved  = 'to_nearest_point_element'
  [../]
[]

test/tests/transfers/multiapp_conservative_transfer/master_nearest_point.i

[Mesh]
  [gen]
    type = GeneratedMeshGenerator
    dim = 2
    xmax = 1
    ymax = 1
    nx = 10
    ny = 10
  []
  [block1]
    input = gen
    type = SubdomainBoundingBoxGenerator
    block_id = 1
    bottom_left = '0.5 0 0'
    top_right = '1 1 0'
  []
[]

[Variables]
  [power_density]
  []
[]

[Functions]
  [pwr_func]
    type = ParsedFunction
    value = '1e3*x*(1-x)+5e2'
  []
[]

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

  [coupledforce]
    type = BodyForce
    variable = power_density
    function = pwr_func
  []
[]

[BCs]
  [left]
    type = DirichletBC
    variable = power_density
    boundary = left
    value = 0
  []
  [right]
    type = DirichletBC
    variable = power_density
    boundary = right
    value = 1e3
  []
[]

[AuxVariables]
  [from_sub]
  []
[]

[VectorPostprocessors]
  [from_nearest_point]
    type = NearestPointIntegralVariablePostprocessor
    variable = power_density
    points = '0 0.5 0 1 0.5 0'
    execute_on = 'transfer nonlinear TIMESTEP_END'
  []

  [to_nearest_point]
    type = NearestPointIntegralVariablePostprocessor
    variable = from_sub
    points = '0 0.5 0 1 0.5 0'
    execute_on = 'transfer nonlinear TIMESTEP_END'
  []
[]

[Executioner]
  type = Steady
  solve_type = 'PJFNK'
  petsc_options_iname = '-pc_type -pc_hypre_type'
  petsc_options_value = 'hypre boomeramg'
[]

[MultiApps]
  [sub]
    type = FullSolveMultiApp
    input_files = sub_nearest_point.i
    positions = '0 0 0 0.5 0 0'
    execute_on = timestep_end
  []
[]

[Transfers]
  [to_sub]
    type = MultiAppMeshFunctionTransfer
    direction = to_multiapp
    source_variable = power_density
    variable = from_master
    multi_app = sub
    execute_on = timestep_end

    # The following inputs specify what postprocessors should be conserved
    # 1 NearestPointIntegralVariablePostprocessor is specified on the master
    # side with N points, where N is the number of subapps
    # 1 pp is specified on the subapp side
    from_postprocessors_to_be_preserved = 'from_nearest_point'
    to_postprocessors_to_be_preserved = 'from_master_pp'
  []

  [from_sub]
    type = MultiAppMeshFunctionTransfer
    direction = from_multiapp
    source_variable = sink
    variable = from_sub
    multi_app = sub
    execute_on = timestep_end

    # The following inputs specify what postprocessors should be conserved
    # 1 NearestPointIntegralVariablePostprocessor is specified on the master
    # with N points, where N is the number of subapps
    # 1 pp is specified on the subapp side
    to_postprocessors_to_be_preserved = 'to_nearest_point'
    from_postprocessors_to_be_preserved = 'sink'
  []
[]

[Outputs]
  csv = true
  exodus = true
[]

References

Input Parameters
Input Files
References

Application Usage

Physics and Syntax

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