SpecificVolumeAux.C

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* 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 "SpecificVolumeAux.h"
 
registerMooseObject("NavierStokesApp", SpecificVolumeAux);
 
template <>
InputParameters
validParams<SpecificVolumeAux>()
{
  InputParameters params = validParams<AuxKernel>();
  params.addRequiredCoupledVar("rho", "Density of the phase");
  params.addCoupledVar("area", 1., "Cross-sectional area (if used)");
  params.addCoupledVar("alpha", 1., "Volume fraction (if used)");
 
  return params;
}
 
SpecificVolumeAux::SpecificVolumeAux(const InputParameters & parameters)
  : AuxKernel(parameters),
    _rho(coupledValue("rho")),
    _area(coupledValue("area")),
    _alpha(coupledValue("alpha"))
{
}
 
Real
SpecificVolumeAux::computeValue()
{
  mooseAssert(_rho[_qp] != 0, "Detected zero density.");
  return _alpha[_qp] * _area[_qp] / _rho[_qp];
}