ACInterfaceKobayashi2

under construction:Undocumented Class

The ACInterfaceKobayashi2 has not been documented. The content listed below should be used as a starting point for documenting the class, which includes the typical automatic documentation associated with a MooseObject; however, what is contained is ultimately determined by what is necessary to make the documentation clear for users.


# ACInterfaceKobayashi2

!syntax description /Kernels/ACInterfaceKobayashi2

## Overview

!! Replace these lines with information regarding the ACInterfaceKobayashi2 object.

## Example Input File Syntax

!! Describe and include an example of how to use the ACInterfaceKobayashi2 object.

!syntax parameters /Kernels/ACInterfaceKobayashi2

!syntax inputs /Kernels/ACInterfaceKobayashi2

!syntax children /Kernels/ACInterfaceKobayashi2

Anisotropic Gradient energy Allen-Cahn Kernel Part 2

Input Parameters

variableThe name of the variable that this Kernel operates on
C++ Type:NonlinearVariableName
Options:
Description:The name of the variable that this Kernel operates on

Required Parameters

argsVector of nonlinear variable arguments this object depends on
C++ Type:std::vector
Options:
Description:Vector of nonlinear variable arguments this object depends on
blockThe list of block ids (SubdomainID) that this object will be applied
C++ Type:std::vector
Options:
Description:The list of block ids (SubdomainID) that this object will be applied
depsdgrad_op_namedepsdgrad_opThe derivative of the anisotropic interface parameter eps with respect to grad_op
Default:depsdgrad_op
C++ Type:MaterialPropertyName
Options:
Description:The derivative of the anisotropic interface parameter eps with respect to grad_op
displacementsThe displacements
C++ Type:std::vector
Options:
Description:The displacements
eps_nameepsThe anisotropic parameter
Default:eps
C++ Type:MaterialPropertyName
Options:
Description:The anisotropic parameter
mob_nameLThe mobility used with the kernel
Default:L
C++ Type:MaterialPropertyName
Options:
Description:The mobility used with the kernel

Optional Parameters

control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector
Options:
Description:Adds user-defined labels for accessing object parameters via control logic.
diag_save_inThe name of auxiliary variables to save this Kernel's diagonal Jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
C++ Type:std::vector
Options:
Description:The name of auxiliary variables to save this Kernel's diagonal Jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Options:
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
Options:
Description:Determines whether this object is calculated using an implicit or explicit form
save_inThe name of auxiliary variables to save this Kernel's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
C++ Type:std::vector
Options:
Description:The name of auxiliary variables to save this Kernel's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
seed0The seed for the master random number generator
Default:0
C++ Type:unsigned int
Options:
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
Options:
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

extra_matrix_tagsThe extra tags for the matrices this Kernel should fill
C++ Type:std::vector
Options:
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
Options:
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
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
Description:The tag for the vectors this Kernel should fill

Tagging Parameters

Input Files

modules/phase_field/examples/anisotropic_interfaces/snow.i
modules/phase_field/test/tests/anisotropic_interfaces/kobayashi.i

modules/phase_field/examples/anisotropic_interfaces/snow.i

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 14
  ny = 14
  xmax = 9
  ymax = 9
  uniform_refine = 3
[]

[Variables]
  [./w]
  [../]
  [./T]
  [../]
[]

[ICs]
  [./wIC]
    type = SmoothCircleIC
    variable = w
    int_width = 0.1
    x1 = 4.5
    y1 = 4.5
    radius = 0.07
    outvalue = 0
    invalue = 1
  [../]
[]

[Kernels]
  [./w_dot]
    type = TimeDerivative
    variable = w
  [../]
  [./anisoACinterface1]
    type = ACInterfaceKobayashi1
    variable = w
    mob_name = M
  [../]
  [./anisoACinterface2]
    type = ACInterfaceKobayashi2
    variable = w
    mob_name = M
  [../]
  [./AllenCahn]
    type = AllenCahn
    variable = w
    mob_name = M
    f_name = fbulk
    args = T
  [../]
  [./T_dot]
    type = TimeDerivative
    variable = T
  [../]
  [./CoefDiffusion]
    type = Diffusion
    variable = T
  [../]
  [./w_dot_T]
    type = CoefCoupledTimeDerivative
    variable = T
    v = w
    coef = -1.8
  [../]
[]

[Materials]
  [./free_energy]
    type = DerivativeParsedMaterial
    f_name = fbulk
    args = 'w T'
    constant_names = pi
    constant_expressions = 4*atan(1)
    function = 'm:=0.9 * atan(10 * (1 - T)) / pi; 1/4*w^4 - (1/2 - m/3) * w^3 + (1/4 - m/2) * w^2'
    derivative_order = 2
    outputs = exodus
  [../]
  [./material]
    type = InterfaceOrientationMaterial
    op = w
  [../]
  [./consts]
    type = GenericConstantMaterial
    prop_names  = 'M'
    prop_values = '3333.333'
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Executioner]
  type = Transient
  scheme = bdf2
  solve_type = PJFNK
  petsc_options_iname = '-pc_type -pc_hypre_type -ksp_gmres_restart'
  petsc_options_value = 'hypre    boomeramg      31'

  nl_abs_tol = 1e-10
  nl_rel_tol = 1e-08
  l_max_its = 30

  end_time = 1

  [./TimeStepper]
    type = IterationAdaptiveDT
    optimal_iterations = 6
    iteration_window = 2
    dt = 0.0005
    growth_factor = 1.1
    cutback_factor = 0.75
  [../]
  [./Adaptivity]
    initial_adaptivity = 3 # Number of times mesh is adapted to initial condition
    refine_fraction = 0.7 # Fraction of high error that will be refined
    coarsen_fraction = 0.1 # Fraction of low error that will coarsened
    max_h_level = 5 # Max number of refinements used, starting from initial mesh (before uniform refinement)
    weight_names = 'w T'
    weight_values = '1 0.5'
  [../]
[]

[Outputs]
  interval = 5
  exodus = true
[]

modules/phase_field/test/tests/anisotropic_interfaces/kobayashi.i

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 32
  ny = 32
  xmax = 0.7
  ymax = 0.7
[]

[Variables]
  [./w]
  [../]
  [./T]
  [../]
[]

[ICs]
  [./wIC]
    type = SmoothCircleIC
    variable = w
    int_width = 0.1
    x1 = 0.35
    y1 = 0.35
    radius = 0.08
    outvalue = 0
    invalue = 1
  [../]
[]

[Kernels]
  [./w_dot]
    type = TimeDerivative
    variable = w
  [../]
  [./anisoACinterface1]
    type = ACInterfaceKobayashi1
    variable = w
    mob_name = M
  [../]
  [./anisoACinterface2]
    type = ACInterfaceKobayashi2
    variable = w
    mob_name = M
  [../]
  [./AllenCahn]
    type = AllenCahn
    variable = w
    mob_name = M
    f_name = fbulk
    args = 'T'
  [../]
  [./T_dot]
    type = TimeDerivative
    variable = T
  [../]
  [./CoefDiffusion]
    type = Diffusion
    variable = T
  [../]
  [./w_dot_T]
    type = CoefCoupledTimeDerivative
    variable = T
    v = w
    coef = -1.8 #This is -K from kobayashi's paper
  [../]
[]

[Materials]
  [./free_energy]
    type = DerivativeParsedMaterial
    f_name = fbulk
    args = 'w T'
    constant_names = 'alpha gamma T_e pi'
    constant_expressions = '0.9 10 1 4*atan(1)'
    function = 'm:=alpha/pi * atan(gamma * (T_e - T)); 1/4*w^4 - (1/2 - m/3) * w^3 + (1/4 - m/2) * w^2'
    derivative_order = 2
    outputs = exodus
  [../]
  [./material]
    type = InterfaceOrientationMaterial
    op = w
  [../]
  [./consts]
    type = GenericConstantMaterial
    prop_names  = 'M'
    prop_values = '3333.333'
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Executioner]
  type = Transient
  solve_type = PJFNK
  scheme = bdf2
  petsc_options_iname = '-pc_type'
  petsc_options_value = 'lu'

  nl_rel_tol = 1e-08
  l_tol = 1e-4
  l_max_its = 30

  dt = 0.001
  num_steps = 6
[]

[Outputs]
  exodus = true
  perf_graph = true
  execute_on = 'INITIAL FINAL'
[]

Input Parameters
Input Files

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