FVFunctionIC

An initial condition that uses a normal function of x, y, z to produce values (and optionally gradients) for a field variable.

Sets an initial condition via a Function described by parameter "function". It can be restricted to particular blocks using the "block" parameter.

Example input syntax

In this example, we set the initial value of variable u using a ParsedFunction.

[FVICs]
  [u_ic]
    type = FVFunctionIC
    variable = 'u'
    function = parsed_function
  []
[]

[Functions]
  [parsed_function]
    type = ParsedFunction
    expression = 'sin(x)-cos(y/2)'
  []
[]

Input Parameters

functionThe initial condition function.
C++ Type:FunctionName
Controllable:No
Description:The initial condition function.
variableThe variable this initial condition is supposed to provide values for.
C++ Type:VariableName
Controllable:No
Description:The variable this initial condition is supposed to provide values for.

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
scaling_factor1Scaling factor to apply on the function
Default:1
C++ Type:double
Controllable:No
Description:Scaling factor to apply on the function

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.

Advanced Parameters

(moose/test/tests/fvics/function_ic/parsed_function.i)

[Mesh]
  [gmg]
    type = GeneratedMeshGenerator
    dim = 2
    xmin = 0
    xmax = 3.1416
    ymin = 0
    ymax = 3.1416
    nx = 10
    ny = 10
  []
[]

[Variables]
  [u]
    type = MooseVariableFVReal
  []
[]

[Functions]
  [parsed_function]
    type = ParsedFunction
    expression = 'sin(x)-cos(y/2)'
  []
[]

[FVICs]
  [u_ic]
    type = FVFunctionIC
    variable = 'u'
    function = parsed_function
  []
[]

[Executioner]
  type = Steady
[]

[Problem]
  solve = false
[]

[Outputs]
  exodus = true
[]