VacuumBC.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#include "VacuumBC.h"
 
registerMooseObject("MooseApp", VacuumBC);
 
InputParameters
VacuumBC::validParams()
{
  InputParameters params = IntegratedBC::validParams();
  params.addClassDescription("Vacuum boundary condition for diffusion.");
  params.addParam<Real>("alpha", 1, "Diffusion coefficient.");
  return params;
}
 
VacuumBC::VacuumBC(const InputParameters & parameters)
  : IntegratedBC(parameters), _alpha(getParam<Real>("alpha"))
{
}
 
Real
VacuumBC::computeQpResidual()
{
  return _test[_i][_qp] * _alpha * _u[_qp] / 2.;
}
 
Real
VacuumBC::computeQpJacobian()
{
  return _test[_i][_qp] * _alpha * _phi[_j][_qp] / 2.;
}