ConstantPointSource

Residual contribution of a constant point source term.

This applies a load in a single location in the mesh. The value field is controllable, so the Control system may be leveraged to control the load during the simulation. Alternatively, a FunctionDiracSource may be used for spatial and temporal variations of the point source using a Function.

Example input syntax

In this example, three ConstantPointSource are being applied to variable u with values 0.1 / -0.1 and -1 at position (0.2 0.3 0.0) / (0.2 0.8 0) and (0.8 0.5 0.8) respectively. u is solution to a diffusion equation with those three sources.

[DiracKernels]
  [./point_source1]
    type = ConstantPointSource
    variable = u
    value = 0.1
    point = '0.2 0.3 0.0'
  [../]
  [./point_source2]
    type = ConstantPointSource
    variable = u
    value = -0.1
    point = '0.2 0.8 0.0'
  [../]
  [./point_source3]
    type = ConstantPointSource
    variable = u
    value = -1.0
    point = '0.8 0.5 0.8'
  [../]
[]
(../moose/test/tests/dirackernels/constant_point_source/3d_point_source.i)

Input Parameters

  • pointThe x,y,z coordinates of the point

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

    Controllable:No

    Description:The x,y,z coordinates of the point

  • valueThe value of the point source

    C++ Type:double

    Controllable:Yes

    Description:The value of the point source

  • variableThe name of the variable that this residual object operates on

    C++ Type:NonlinearVariableName

    Controllable:No

    Description:The name of the variable that this residual object operates on

Required Parameters

  • allow_moving_sourcesFalseIf true, allow Dirac sources to move, even if the mesh does not move, during the simulation.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:If true, allow Dirac sources to move, even if the mesh does not move, during the simulation.

  • 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

  • point_not_found_behaviorIGNOREBy default (IGNORE), it is ignored if an added point cannot be located in the specified subdomains. If this option is set to ERROR, this situation will result in an error. If this option is set to WARNING, then a warning will be issued.

    Default:IGNORE

    C++ Type:MooseEnum

    Options:ERROR, WARNING, IGNORE

    Controllable:No

    Description:By default (IGNORE), it is ignored if an added point cannot be located in the specified subdomains. If this option is set to ERROR, this situation will result in an error. If this option is set to WARNING, then a warning will be issued.

  • 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.

Optional Parameters

  • absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution

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

    Controllable:No

    Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution

  • extra_matrix_tagsThe extra tags for the matrices this Kernel should fill

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

    Controllable:No

    Description:The extra tags for the matrices this Kernel should fill

  • extra_vector_tagsThe extra tags for the vectors this Kernel should fill

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

    Controllable:No

    Description:The extra tags for the vectors this Kernel should fill

  • matrix_tagssystemThe tag for the matrices this Kernel should fill

    Default:system

    C++ Type:MultiMooseEnum

    Options:nontime, system

    Controllable:No

    Description:The tag for the matrices this Kernel should fill

  • vector_tagsnontimeThe tag for the vectors this Kernel should fill

    Default:nontime

    C++ Type:MultiMooseEnum

    Options:nontime, time

    Controllable:No

    Description:The tag for the vectors this Kernel should fill

Tagging 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.

  • drop_duplicate_pointsTrueBy default points added to a DiracKernel are dropped if a point at the same locationhas been added before. If this option is set to false duplicate points are retainedand contribute to residual and Jacobian.

    Default:True

    C++ Type:bool

    Controllable:No

    Description:By default points added to a DiracKernel are dropped if a point at the same locationhas been added before. If this option is set to false duplicate points are retainedand contribute to residual and Jacobian.

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Controllable:Yes

    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

    Controllable:No

    Description:Determines whether this object is calculated using an implicit or explicit form

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Controllable:No

    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

    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