CoupledODETimeDerivative

Residual contribution of ODE from the time derivative of a coupled variable.

The CoupledODETimeDerivative is similar to the ODETimeDerivative scalar kernel, except that the derivative acts on a different variable than the ODE is solved for.

Example input syntax

In this example, the scalar variables f and f_times_mult are the solutions to the coupled ODE problem:

The time derivative term for the first equation is added using a CoupledODETimeDerivative scalar kernel, as the first equation is set to have f as its nonlinear variable, even though f does not appear in it!

[ScalarKernels]
  [./dT]
    type = CoupledODETimeDerivative
    variable = f
    v = f_times_mult
  [../]

  [./src]
    type = ParsedODEKernel
    variable = f
    expression = '-1'
  [../]

  [./f_times_mult_1]
    type = ParsedODEKernel
    variable = f_times_mult
    expression = 'f_times_mult'
  [../]

  [./f_times_mult_2]
    type = ParsedODEKernel
    variable = f_times_mult
    expression = '-f * g'
    coupled_variables = 'f g'
  [../]
[]
(moose/test/tests/kernels/ode/coupled_ode_td.i)

Input Parameters

  • vCoupled variable.

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

    Controllable:No

    Description:Coupled variable.

  • 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

  • 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_tagssystem timeThe tag for the matrices this Kernel should fill

    Default:system time

    C++ Type:MultiMooseEnum

    Options:nontime, system, time

    Controllable:No

    Description:The tag for the matrices this Kernel should fill

  • vector_tagstimeThe tag for the vectors this Kernel should fill

    Default:time

    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.

  • 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