# GBEvolution

under construction:Undocumented Class

The GBEvolution 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.


# GBEvolution

!syntax description /Materials/GBEvolution

## Overview

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

## Example Input File Syntax

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

!syntax parameters /Materials/GBEvolution

!syntax inputs /Materials/GBEvolution

!syntax children /Materials/GBEvolution


Computes necessary material properties for the isotropic grain growth model

## Input Parameters

• GBenergyGrain boundary energy in J/m^2

C++ Type:double

Options:

Description:Grain boundary energy in J/m^2

• TTemperature in Kelvin

C++ Type:std::vector

Options:

Description:Temperature in Kelvin

• wGBDiffuse GB width in the length scale of the model

C++ Type:double

Options:

Description:Diffuse GB width in the length scale of the model

### Required Parameters

• GBMobility-1GB mobility input in m^4/(J*s), that overrides the temperature dependent calculation

Default:-1

C++ Type:double

Options:

Description:GB mobility input in m^4/(J*s), that overrides the temperature dependent calculation

• GBmob00Grain boundary mobility prefactor in m^4/(J*s)

Default:0

C++ Type:double

Options:

Description:Grain boundary mobility prefactor in m^4/(J*s)

• Q0Grain boundary migration activation energy in eV

Default:0

C++ Type:double

Options:

Description:Grain boundary migration activation energy in eV

• 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

• boundaryThe list of boundary IDs from the mesh where this boundary condition applies

C++ Type:std::vector

Options:

Description:The list of boundary IDs 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

Options:

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

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

• f0s0.125The GB energy constant

Default:0.125

C++ Type:double

Options:

Description:The GB energy constant

• length_scale1e-09Length scale in m, where default is nm

Default:1e-09

C++ Type:double

Options:

Description:Length scale in m, where default is nm

• molar_volume2.462e-05Molar volume in m^3/mol, needed for temperature gradient driving force

Default:2.462e-05

C++ Type:double

Options:

Description:Molar volume in m^3/mol, needed for temperature gradient driving force

• time_scale1e-09Time scale in s, where default is ns

Default:1e-09

C++ Type:double

Options:

Description:Time scale in s, where default is ns

### 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.

• 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

• 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

• output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)

C++ Type:std::vector

Options:

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

Options:

Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object