SimpleCoupledACInterface.C

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//* This file is part of the MOOSE framework
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//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
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//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#include "SimpleCoupledACInterface.h"
 
registerMooseObject("PhaseFieldApp", SimpleCoupledACInterface);
 
template <>
InputParameters
validParams<SimpleCoupledACInterface>()
{
  InputParameters params = validParams<Kernel>();
  params.addClassDescription("Gradient energy for Allen-Cahn Kernel with constant Mobility and "
                             "Interfacial parameter for a coupled order parameter variable.");
  params.addRequiredCoupledVar("v", "Coupled variable that the Laplacian is taken of");
  params.addParam<MaterialPropertyName>("mob_name", "L", "The mobility used with the kernel");
  params.addParam<MaterialPropertyName>("kappa_name", "kappa_op", "The kappa used with the kernel");
  return params;
}
 
SimpleCoupledACInterface::SimpleCoupledACInterface(const InputParameters & parameters)
  : Kernel(parameters),
    _L(getMaterialProperty<Real>("mob_name")),
    _kappa(getMaterialProperty<Real>("kappa_name")),
    _grad_v(coupledGradient("v")),
    _v_var(coupled("v", 0))
{
}
 
Real
SimpleCoupledACInterface::computeQpResidual()
{
  return _grad_v[_qp] * _kappa[_qp] * _L[_qp] * _grad_test[_i][_qp];
}
 
Real
SimpleCoupledACInterface::computeQpOffDiagJacobian(unsigned int jvar)
{
  if (jvar == _v_var)
    return _grad_phi[_j][_qp] * _kappa[_qp] * _L[_qp] * _grad_test[_i][_qp];
 
  return 0.0;
}