- wDouble well height parameter
C++ Type:double
Controllable:No
Description:Double well height parameter
Compute Surface Tension KKS
Surface tension of an interface defined by the gradient of an order parameter
Description
This material generates a surface tension tensor in the interface between two phases in the Kim-Kim-Suzuki (KKS) phase-field model (Kim et al. (1999)). The surface tension consists of two orthogonal principal components lying in plane of the interface. The approach is based on the formulation described in Levitas and Samani (2011). (For solid surfaces where the surface stress is to be specifed rather than surface tension, use the ComputeInterfaceStress kernel instead.)
The surface tension tensor is given by where is the free energy barrier between phases, is the double-well function, is the order parameter, is the gradient energy coefficient, is the identity tensor, and denotes the dyadic product.
Example Input File Syntax
[./interface_stress]
type = ComputeSurfaceTensionKKS
v = eta
kappa_name = kappa
w = 0.0033
[../]
Input 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 object applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:The list of boundaries (ids or names) from the mesh where this object 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
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.
- ggBarrier Function Material that provides g(eta)
Default:g
C++ Type:MaterialPropertyName
Controllable:No
Description:Barrier Function Material that provides g(eta)
- kappa_namekappa_opGradient energy coefficient
Default:kappa_op
C++ Type:MaterialPropertyName
Controllable:No
Description:Gradient energy coefficient
- planar_stress_nameextra_stressMaterial property name for the interfacial planar stress
Default:extra_stress
C++ Type:MaterialPropertyName
Controllable:No
Description:Material property name for the interfacial planar stress
- 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.
- vOrder parameter that defines the interface, assumed to vary from 0 to 1.
C++ Type:std::vector<VariableName>
Controllable:No
Description:Order parameter that defines the interface, assumed to vary from 0 to 1.
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: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
- 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 where 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 where you would like to restrict the output of variables(s) associated with this object
Outputs Parameters
References
- Seong Gyoon Kim, Won Tae Kim, and Toshio Suzuki.
Phase-field model for binary alloys.
Physical Review E, 60(6):7186–7197, December 1999.
URL: http://link.aps.org/doi/10.1103/PhysRevE.60.7186 (visited on 2014-03-31), doi:10.1103/PhysRevE.60.7186.[BibTeX]
- V. I. Levitas and K. Samani.
Size and mechanics effects in surface-induced melting of nanoparticles.
Nature Communications, 2:284, 2011.
URL: https://www.nature.com/articles/ncomms1275, doi:10.1038/ncomms1275.[BibTeX]