THMSpecificVolumeAux.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 "THMSpecificVolumeAux.h"

registerMooseObject("ThermalHydraulicsApp", THMSpecificVolumeAux);

InputParameters
THMSpecificVolumeAux::validParams()
{
  InputParameters params = AuxKernel::validParams();
  params.addRequiredCoupledVar("rhoA",
                               "Density of the phase (conserved), \alpha \rho A for 2-phase model");
  params.addRequiredCoupledVar("A", "Cross-sectional area");
  params.addCoupledVar("alpha", 1., "Volume fraction");
  params.addClassDescription("Computes the specific volume for the phase.");

  return params;
}

THMSpecificVolumeAux::THMSpecificVolumeAux(const InputParameters & parameters)
  : AuxKernel(parameters),
    _rhoA(coupledValue("rhoA")),
    _area(coupledValue("A")),
    _alpha(coupledValue("alpha"))
{
}

Real
THMSpecificVolumeAux::computeValue()
{
  mooseAssert(_rhoA[_qp] != 0, "Detected zero density.");
  Real v = _alpha[_qp] * _area[_qp] / _rhoA[_qp];
  mooseAssert(v >= 0., "specific volume is negative.");
  return v;
}