DerivativeSumMaterial

Meta-material to sum up multiple derivative materials

Description

This material generates new material properties that sum up the values and derivatives of a specified set of function materials. Using args argument the union of all sets of dependent variables has to be specified so that the DerivativeSumMaterial can gather the necessary derivatives to sum up.

Example usage

[./free_energy]
  type = DerivativeSumMaterial
  f_name = F_sum
  sum_materials = 'Fa Fb Fb'
  args = 'c'
  outputs = all
[../]

Input Parameters

argsArguments of the free energy functions being summed - use vector coupling
C++ Type:std::vector<VariableName>
Controllable:No
Description:Arguments of the free energy functions being summed - use vector coupling

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
boundaryThe list of boundaries (ids or names) from the mesh where this boundary condition applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:The list of boundaries (ids or names) from the mesh where this boundary condition applies
computeTrueWhen false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.
Default:True
C++ Type:bool
Controllable:No
Description:When false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.
constant_onNONEWhen ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped
Default:NONE
C++ Type:MooseEnum
Options:NONE, ELEMENT, SUBDOMAIN
Controllable:No
Description:When ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped
declare_suffixAn optional suffix parameter that can be appended to any declared 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 declared properties. The suffix will be prepended with a '_' character.
derivative_order3Maximum order of derivatives taken (2 or 3)
Default:3
C++ Type:unsigned int
Controllable:No
Description:Maximum order of derivatives taken (2 or 3)
displacement_gradientsVector of displacement gradient variables (see Modules/PhaseField/DisplacementGradients action)
C++ Type:std::vector<VariableName>
Controllable:No
Description:Vector of displacement gradient variables (see Modules/PhaseField/DisplacementGradients action)
f_nameFBase name of the free energy function (used to name the material properties)
Default:F
C++ Type:std::string
Controllable:No
Description:Base name of the free energy function (used to name the material properties)
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.
sum_materialsBase name of the free energy function (used to name the material properties)
C++ Type:std::vector<std::string>
Controllable:No
Description:Base name of the free energy function (used to name the material properties)
validate_couplingTrueCheck if all variables the specified materials depend on are listed in the `args` parameter.
Default:True
C++ Type:bool
Controllable:No
Description:Check if all variables the specified materials depend on are listed in the `args` parameter.

Optional Parameters

constant0Constant to be added to the prefactor multiplied sum.
Default:0
C++ Type:double
Controllable:No
Description:Constant to be added to the prefactor multiplied sum.
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
prefactorPrefactor to multiply the sum term with.
C++ Type:std::vector<double>
Controllable:No
Description:Prefactor to multiply the sum term with.
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

output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)
C++ Type:std::vector<std::string>
Controllable:No
Description:List of material properties, from this material, to output (outputs must also be defined to an output type)
outputsnone Vector of output names were you would like to restrict the output of variables(s) associated with this object
Default:none
C++ Type:std::vector<OutputName>
Controllable:No
Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object

Outputs Parameters

(../../../SoftwareDownloads/moose/test/tests/materials/derivative_sum_material/random_ic.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 10
  ny = 10
  xmax = 250
  ymax = 250
  elem_type = QUAD4
[]

[Variables]
  [./c]
    [./InitialCondition]
      type = RandomIC
    [../]
  [../]
[]

[Kernels]
  [./w_res]
    type = Diffusion
    variable = c
  [../]
  [./time]
    type = TimeDerivative
    variable = c
  [../]
[]

[Materials]
  [./free_energy1]
    type = DerivativeParsedMaterial
    f_name = Fa
    args = 'c'
    function = (c-0.1)^4*(1-0.1-c)^4
  [../]
  [./free_energy2]
    type = DerivativeParsedMaterial
    f_name = Fb
    args = 'c'
    function = -0.25*(c-0.1)^4*(1-0.1-c)^4
  [../]

  # Fa+Fb+Fb == Fc
  [./free_energy3]
    type = DerivativeParsedMaterial
    f_name = Fc
    args = 'c'
    function = 0.5*(c-0.1)^4*(1-0.1-c)^4
    outputs = all
  [../]
  [./dfree_energy3]
    type = DerivativeParsedMaterial
    f_name = dFc
    args = 'c'
    material_property_names = 'F:=D[Fc,c]'
    function = F
    outputs = all
  [../]
  [./d2free_energy3]
    type = DerivativeParsedMaterial
    f_name = d2Fc
    args = 'c'
    material_property_names = 'F:=D[Fc,c,c]'
    function = F
    outputs = all
  [../]

  [./free_energy]
    type = DerivativeSumMaterial
    f_name = F_sum
    sum_materials = 'Fa Fb Fb'
    args = 'c'
    outputs = all
  [../]
  [./dfree_energy]
    type = DerivativeParsedMaterial
    f_name = dF_sum
    material_property_names = 'F:=D[F_sum,c]'
    function = F
    args = 'c'
    outputs = all
  [../]
  [./d2free_energy]
    type = DerivativeParsedMaterial
    f_name = d2F_sum
    material_property_names = 'F:=D[F_sum,c,c]'
    function = F
    args = 'c'
    outputs = all
  [../]
[]

[Executioner]
  type = Transient
  num_steps = 1
[]

[Postprocessors]
  [./F_sum]
    type = ElementAverageValue
    variable = F_sum
  [../]
  [./F_check]
    type = ElementAverageValue
    variable = Fc
  [../]
  [./dF_sum]
    type = ElementAverageValue
    variable = dF_sum
  [../]
  [./dF_check]
    type = ElementAverageValue
    variable = dFc
  [../]
  [./d2F_sum]
    type = ElementAverageValue
    variable = d2F_sum
  [../]
  [./d2F_check]
    type = ElementAverageValue
    variable = d2Fc
  [../]
[]

[Outputs]
  exodus = true
[]

Description
Example usage
Input Parameters