LMDiffusion.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 "Kernel.h"

class LMDiffusion : public Kernel
{
public:
  LMDiffusion(const InputParameters & parameters);

  static InputParameters validParams();

protected:
  Real computeQpResidual() override;
  Real computeQpJacobian() override;
  Real computeQpOffDiagJacobian(unsigned int jvar) override;

private:
  const unsigned int _primal_var;

  const VariableSecond & _second_primal;

  const VariablePhiSecond & _second_primal_phi;

  const Real _lm_sign;

  const Real _diffusivity;
};