NSKernel.h

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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

#pragma once

#include "Kernel.h"

// Forward Declarations
class IdealGasFluidProperties;

class NSKernel : public Kernel
{
public:
  static InputParameters validParams();

  NSKernel(const InputParameters & parameters);

protected:
  // Coupled variables
  const VariableValue & _u_vel;
  const VariableValue & _v_vel;
  const VariableValue & _w_vel;

  const VariableValue & _rho;
  const VariableValue & _rho_u;
  const VariableValue & _rho_v;
  const VariableValue & _rho_w;
  const VariableValue & _rho_et;

  // Gradients
  const VariableGradient & _grad_rho;
  const VariableGradient & _grad_rho_u;
  const VariableGradient & _grad_rho_v;
  const VariableGradient & _grad_rho_w;
  const VariableGradient & _grad_rho_et;

  // Variable numberings
  unsigned _rho_var_number;
  unsigned _rhou_var_number;
  unsigned _rhov_var_number;
  unsigned _rhow_var_number;
  unsigned _rho_et_var_number;

  // Integrated BC can use Mat. properties...
  const MaterialProperty<Real> & _dynamic_viscosity;
  const MaterialProperty<RealTensorValue> & _viscous_stress_tensor; // Includes _dynamic_viscosity

  // Fluid properties
  const IdealGasFluidProperties & _fp;

  bool isNSVariable(unsigned var);
  unsigned mapVarNumber(unsigned var);
};