GapFluxModelRadiationBase.h

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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

#pragma once

#include "GapFluxModelBase.h"

class GapFluxModelRadiationBase : public GapFluxModelBase
{
public:
  static InputParameters validParams();

  GapFluxModelRadiationBase(const InputParameters & parameters);

protected:
  ADReal computeRadiationFlux(const ADReal & secondary_T, const ADReal & primary_T) const;

  Real emissivity() const;

  const Real _stefan_boltzmann;

  unsigned int _radial_coord;

  const Real _eps_primary;

  const Real _eps_secondary;

  const bool _has_zero_emissivity;

  const Real _parallel_plate_emissivity;

  Moose::CoordinateSystemType _coord_system;
};