GrainBoundaryVelocity

This will compute the velocity of the grain boundary edge and display those values for visualization purposes. Only one AuxVariable is required, and optional variables for the range we are interested in are also available.

Overview

we are using the equation: $var element = document.getElementById("moose-equation-2d653cd9-ea98-45af-885b-526b2bd3ca57");katex.render("\\frac{1}{\\left | \\triangledown \\eta \\right |} \\frac{d\\eta}{dt} = v", element, {displayMode:true,throwOnError:false,macros:{"\\pf":"\\frac{\\partial #1}{\\partial #2}"}});$ which computes the perpendicular velocity at each quadrature point in the range specified.

Example Input File Syntax

[./velocity]
  order = CONSTANT
  family = MONOMIAL
[../]

[./velocity]
  type = GrainBoundaryVelocity
  variable = velocity
[../]

Input Parameters

vArray of coupled variables
C++ Type:std::vector<VariableName>
Options:
Description:Array of coupled variables
variableThe name of the variable that this object applies to
C++ Type:AuxVariableName
Options:
Description:The name of the variable that this object applies to

Required Parameters

blockThe list of block ids (SubdomainID) that this object will be applied
C++ Type:std::vector<SubdomainName>
Options:
Description:The list of block ids (SubdomainID) that this object will be applied
boundaryThe list of boundary IDs from the mesh where this boundary condition applies
C++ Type:std::vector<BoundaryName>
Options:
Description:The list of boundary IDs from the mesh where this boundary condition applies
check_boundary_restrictedTrueWhether to check for multiple element sides on the boundary in the case of a boundary restricted, element aux variable. Setting this to false will allow contribution to a single element's elemental value(s) from multiple boundary sides on the same element (example: when the restricted boundary exists on two or more sides of an element, such as at a corner of a mesh
Default:True
C++ Type:bool
Options:
Description:Whether to check for multiple element sides on the boundary in the case of a boundary restricted, element aux variable. Setting this to false will allow contribution to a single element's elemental value(s) from multiple boundary sides on the same element (example: when the restricted boundary exists on two or more sides of an element, such as at a corner of a mesh
eta_bottom0.2start point on range of eta we are interested in.
Default:0.2
C++ Type:double
Options:
Description:start point on range of eta we are interested in.
eta_top0.8end point on range of eta we are interested in.
Default:0.8
C++ Type:double
Options:
Description:end point on range of eta we are interested in.
execute_onLINEAR TIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM, PRE_DISPLACE.
Default:LINEAR TIMESTEP_END
C++ Type:ExecFlagEnum
Options:NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM, PRE_DISPLACE
Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM, PRE_DISPLACE.
op_numArray of coupled variables (num_name)
C++ Type:unsigned int
Options:
Description:Array of coupled variables (num_name)
var_name_baseArray of coupled variables (base_name)
C++ Type:std::string
Options:
Description:Array of coupled variables (base_name)

Optional Parameters

control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Options:
Description:Adds user-defined labels for accessing object parameters via control logic.
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Options:
Description:Set the enabled status of the MooseObject.
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

Input Files

(modules/phase_field/test/tests/Grain_Velocity_Computation/GrainBoundaryVelocityTest.i)

(modules/phase_field/test/tests/Grain_Velocity_Computation/GrainBoundaryVelocityTest.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 10
  ny = 10
  xmax = 1000
  ymax = 1000
  elem_type = QUAD4
  uniform_refine = 2
[]

[GlobalParams]
  op_num = 4
  var_name_base = 'gr'
[]

[Variables]
  [./PolycrystalVariables]
  [../]
[]

[UserObjects]
  [./voronoi]
    type = PolycrystalVoronoi
    rand_seed = 102
    grain_num = 4
    coloring_algorithm = bt
  [../]
[]

[ICs]
  [./PolycrystalICs]
    [./PolycrystalColoringIC]
      polycrystal_ic_uo = voronoi
    [../]
  [../]
[]

[AuxVariables]
  [./velocity]
    order = CONSTANT
    family = MONOMIAL
  [../]
[]

[Kernels]
  [./PolycrystalKernel]
  [../]
[]

[AuxKernels]
  [./velocity]
    type = GrainBoundaryVelocity
    variable = velocity
  [../]
[]

[BCs]
  [./Periodic]
    [./All]
      auto_direction = 'x y'
    [../]
  [../]
[]

[Materials]
  [./Moly_GB]
    type = GBEvolution
    time_scale = 1.0
    GBmob0 = 3.986e-6
    T = 500 # K
    wGB = 60 # nm
    Q = 1.0307
    GBenergy = 2.4
  [../]
[]

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

[Executioner]
  type = Transient
  scheme = bdf2
  solve_type = 'NEWTON'

  petsc_options_iname = '-pc_type -pc_hypre_type -ksp_gmres_restart'
  petsc_options_value = 'hypre boomeramg 31'

  l_tol = 1.0e-4
  l_max_its = 30
  nl_max_its = 20
  nl_rel_tol = 1.0e-9
  start_time = 0.0
  num_steps = 2
  dt = 4
[]

[Outputs]
  exodus = true
[]

(modules/phase_field/test/tests/Grain_Velocity_Computation/GrainBoundaryVelocityTest.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 10
  ny = 10
  xmax = 1000
  ymax = 1000
  elem_type = QUAD4
  uniform_refine = 2
[]

[GlobalParams]
  op_num = 4
  var_name_base = 'gr'
[]

[Variables]
  [./PolycrystalVariables]
  [../]
[]

[UserObjects]
  [./voronoi]
    type = PolycrystalVoronoi
    rand_seed = 102
    grain_num = 4
    coloring_algorithm = bt
  [../]
[]

[ICs]
  [./PolycrystalICs]
    [./PolycrystalColoringIC]
      polycrystal_ic_uo = voronoi
    [../]
  [../]
[]

[AuxVariables]
  [./velocity]
    order = CONSTANT
    family = MONOMIAL
  [../]
[]

[Kernels]
  [./PolycrystalKernel]
  [../]
[]

[AuxKernels]
  [./velocity]
    type = GrainBoundaryVelocity
    variable = velocity
  [../]
[]

[BCs]
  [./Periodic]
    [./All]
      auto_direction = 'x y'
    [../]
  [../]
[]

[Materials]
  [./Moly_GB]
    type = GBEvolution
    time_scale = 1.0
    GBmob0 = 3.986e-6
    T = 500 # K
    wGB = 60 # nm
    Q = 1.0307
    GBenergy = 2.4
  [../]
[]

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

[Executioner]
  type = Transient
  scheme = bdf2
  solve_type = 'NEWTON'

  petsc_options_iname = '-pc_type -pc_hypre_type -ksp_gmres_restart'
  petsc_options_value = 'hypre boomeramg 31'

  l_tol = 1.0e-4
  l_max_its = 30
  nl_max_its = 20
  nl_rel_tol = 1.0e-9
  start_time = 0.0
  num_steps = 2
  dt = 4
[]

[Outputs]
  exodus = true
[]

(modules/phase_field/test/tests/Grain_Velocity_Computation/GrainBoundaryVelocityTest.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 10
  ny = 10
  xmax = 1000
  ymax = 1000
  elem_type = QUAD4
  uniform_refine = 2
[]

[GlobalParams]
  op_num = 4
  var_name_base = 'gr'
[]

[Variables]
  [./PolycrystalVariables]
  [../]
[]

[UserObjects]
  [./voronoi]
    type = PolycrystalVoronoi
    rand_seed = 102
    grain_num = 4
    coloring_algorithm = bt
  [../]
[]

[ICs]
  [./PolycrystalICs]
    [./PolycrystalColoringIC]
      polycrystal_ic_uo = voronoi
    [../]
  [../]
[]

[AuxVariables]
  [./velocity]
    order = CONSTANT
    family = MONOMIAL
  [../]
[]

[Kernels]
  [./PolycrystalKernel]
  [../]
[]

[AuxKernels]
  [./velocity]
    type = GrainBoundaryVelocity
    variable = velocity
  [../]
[]

[BCs]
  [./Periodic]
    [./All]
      auto_direction = 'x y'
    [../]
  [../]
[]

[Materials]
  [./Moly_GB]
    type = GBEvolution
    time_scale = 1.0
    GBmob0 = 3.986e-6
    T = 500 # K
    wGB = 60 # nm
    Q = 1.0307
    GBenergy = 2.4
  [../]
[]

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

[Executioner]
  type = Transient
  scheme = bdf2
  solve_type = 'NEWTON'

  petsc_options_iname = '-pc_type -pc_hypre_type -ksp_gmres_restart'
  petsc_options_value = 'hypre boomeramg 31'

  l_tol = 1.0e-4
  l_max_its = 30
  nl_max_its = 20
  nl_rel_tol = 1.0e-9
  start_time = 0.0
  num_steps = 2
  dt = 4
[]

[Outputs]
  exodus = true
[]

Overview
Example Input File Syntax
Input Parameters
Input Files

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GrainBoundaryVelocity

Overview

Example Input File Syntax

Input Parameters

Required Parameters

Optional Parameters

Advanced Parameters

Input Files