CHSplitChemicalPotential Class Reference

Solves chemical potential in a weak sense (mu-mu_prop=0) Can be coupled to Cahn-Hilliard equation to solve species diffusion Allows spatial derivative of chemical potential when coupled to material state such as stress, etc. More...

#include <CHSplitChemicalPotential.h>

Inheritance diagram for CHSplitChemicalPotential:

Public Member Functions
	CHSplitChemicalPotential (const InputParameters &parameters)

Protected Member Functions
virtual Real	computeQpResidual ()
virtual Real	computeQpJacobian ()
virtual Real	computeQpOffDiagJacobian (unsigned int jvar)

Protected Attributes
MaterialPropertyName	_mu_prop_name
	Chemical potential property evaluated at material points. More...
const MaterialProperty< Real > &	_chemical_potential
const MaterialProperty< Real > &	_dchemical_potential_dc
const unsigned int	_c_var

Detailed Description

Solves chemical potential in a weak sense (mu-mu_prop=0) Can be coupled to Cahn-Hilliard equation to solve species diffusion Allows spatial derivative of chemical potential when coupled to material state such as stress, etc.

Can be used to model species diffusion mediated creep

Definition at line 27 of file CHSplitChemicalPotential.h.

Constructor & Destructor Documentation

CHSplitChemicalPotential()

CHSplitChemicalPotential::CHSplitChemicalPotential

(

const InputParameters &

parameters

)

Definition at line 27 of file CHSplitChemicalPotential.C.

  : DerivativeMaterialInterface<Kernel>(parameters),
    _mu_prop_name(getParam<MaterialPropertyName>("chemical_potential_prop")),
    _chemical_potential(getMaterialProperty<Real>(_mu_prop_name)),
    _dchemical_potential_dc(
        getMaterialPropertyDerivative<Real>(_mu_prop_name, getVar("c", 0)->name())),
    _c_var(coupled("c"))
{
}

Member Function Documentation

computeQpJacobian()

Real CHSplitChemicalPotential::computeQpJacobian ( )

protectedvirtual

Definition at line 44 of file CHSplitChemicalPotential.C.

{
  return _test[_i][_qp] * _phi[_j][_qp];
}

computeQpOffDiagJacobian()

Real CHSplitChemicalPotential::computeQpOffDiagJacobian ( unsigned int  jvar )

protectedvirtual

Definition at line 50 of file CHSplitChemicalPotential.C.

{
  if (jvar == _c_var)
    return -_test[_i][_qp] * _dchemical_potential_dc[_qp] * _phi[_j][_qp];
  else
    return 0.0;
}

computeQpResidual()

Real CHSplitChemicalPotential::computeQpResidual ( )

protectedvirtual

Definition at line 38 of file CHSplitChemicalPotential.C.

{
  return _test[_i][_qp] * (_u[_qp] - _chemical_potential[_qp]);
}

Member Data Documentation

_c_var

const unsigned int CHSplitChemicalPotential::_c_var

protected

Definition at line 42 of file CHSplitChemicalPotential.h.

Referenced by computeQpOffDiagJacobian().

_chemical_potential

const MaterialProperty<Real>& CHSplitChemicalPotential::_chemical_potential

protected

Definition at line 40 of file CHSplitChemicalPotential.h.

Referenced by computeQpResidual().

_dchemical_potential_dc

const MaterialProperty<Real>& CHSplitChemicalPotential::_dchemical_potential_dc

protected

Definition at line 41 of file CHSplitChemicalPotential.h.

Referenced by computeQpOffDiagJacobian().

_mu_prop_name

MaterialPropertyName CHSplitChemicalPotential::_mu_prop_name

protected

Chemical potential property evaluated at material points.

Definition at line 38 of file CHSplitChemicalPotential.h.

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The documentation for this class was generated from the following files:

• phase_field/include/kernels/CHSplitChemicalPotential.h
• phase_field/src/kernels/CHSplitChemicalPotential.C