ViewFactorObjectSurfaceRadiation

Description

ViewFactorObjectSurfaceRadiation inherits from GrayLambertSurfaceRadiationBase and allows automatic computation of view factors. View factors for ViewFactorObjectSurfaceRadiation are provided by a ViewFactorBase object, e.g. UnobstructedPlanarViewFactor.

Example Input syntax

[Mesh]
  type = GeneratedMesh
  dim = 2
  xmin = 0
  xmax = 1
  ymin = 0
  ymax = 2
  nx = 20
  ny = 20
[]

[Problem]
  kernel_coverage_check = false
[]

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

[UserObjects]
  [./gray_lambert]
    type = ViewFactorObjectSurfaceRadiation
    boundary = 'bottom top left right'
    fixed_temperature_boundary = 'bottom top'
    fixed_boundary_temperatures = '550 300'
    adiabatic_boundary = 'right left'
    emissivity = '1 0.75 0.75 0.75'
    temperature = temperature
    view_factor_object_name = view_factor
  [../]

  [./view_factor]
    type = UnobstructedPlanarViewFactor
    boundary = 'left right bottom top'
    normalize_view_factor = true
    execute_on = 'INITIAL'
  [../]
[]

[Postprocessors]
  [./heat_flux_density_bottom]
    type = GrayLambertSurfaceRadiationPP
    surface_radiation_object_name = gray_lambert
    return_type = HEAT_FLUX_DENSITY
    boundary = bottom
  [../]

  [./temperature_left]
    type = GrayLambertSurfaceRadiationPP
    surface_radiation_object_name = gray_lambert
    return_type = TEMPERATURE
    boundary = left
  [../]

  [./temperature_right]
    type = GrayLambertSurfaceRadiationPP
    surface_radiation_object_name = gray_lambert
    return_type = TEMPERATURE
    boundary = right
  [../]

  [./brightness_top]
    type = GrayLambertSurfaceRadiationPP
    surface_radiation_object_name = gray_lambert
    return_type = RADIOSITY
    boundary = top
  [../]
[]

[Executioner]
  type = Transient
  num_steps = 1
[]

[Outputs]
  csv = true
[]
(moose/modules/heat_conduction/test/tests/gray_lambert_radiator/gray_lambert_cavity_automatic_vf.i)

Input Parameters

  • boundaryThe list of boundary IDs from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundary IDs from the mesh where this object applies

  • emissivityEmissivities for each boundary.

    C++ Type:std::vector<double>

    Controllable:No

    Description:Emissivities for each boundary.

  • temperatureThe coupled temperature variable.

    C++ Type:std::vector<VariableName>

    Controllable:No

    Description:The coupled temperature variable.

  • view_factor_object_nameName of the ViewFactor userobjects.

    C++ Type:UserObjectName

    Controllable:No

    Description:Name of the ViewFactor userobjects.

Required Parameters

  • adiabatic_boundaryThe list of boundary IDs from the mesh that are adiabatic.

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundary IDs from the mesh that are adiabatic.

  • 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, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, ALWAYS.

    Default:TIMESTEP_END

    C++ Type:ExecFlagEnum

    Options:NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, ALWAYS

    Controllable:No

    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, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, ALWAYS.

  • fixed_boundary_temperaturesThe temperatures of the fixed boundary.

    C++ Type:std::vector<FunctionName>

    Controllable:No

    Description:The temperatures of the fixed boundary.

  • fixed_temperature_boundaryThe list of boundary IDs from the mesh with fixed temperatures.

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundary IDs from the mesh with fixed temperatures.

  • prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

  • stefan_boltzmann_constant5.67037e-08The Stefan-Boltzmann constant. Default value is in units of [W / m^2 K^4].

    Default:5.67037e-08

    C++ Type:double

    Controllable:No

    Description:The Stefan-Boltzmann constant. Default value is in units of [W / m^2 K^4].

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

    Controllable:No

    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<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:Yes

    Description:Set the enabled status of the MooseObject.

  • execution_order_group0Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.

    Default:0

    C++ Type:int

    Controllable:No

    Description:Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.

  • force_postauxFalseForces the UserObject to be executed in POSTAUX

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Forces the UserObject to be executed in POSTAUX

  • force_preauxFalseForces the UserObject to be executed in PREAUX

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Forces the UserObject to be executed in PREAUX

  • force_preicFalseForces the UserObject to be executed in PREIC during initial setup

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Forces the UserObject to be executed in PREIC during initial setup

  • 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

    Controllable:No

    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