SecondDerivativeRegularization.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
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//* 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 "GenericKernel.h"
 
enum class SecondDerivativeRegularizationType
{
  Huhu = 0,
  Lulu = 1,
  HuhuLulu = 2
};
 
template <bool is_ad>
class SecondDerivativeRegularizationTempl : public GenericKernel<is_ad>
{
public:
  static InputParameters validParams();
 
  SecondDerivativeRegularizationTempl(const InputParameters & parameters);
 
protected:
  virtual GenericReal<is_ad> computeQpResidual() override;
  virtual Real computeQpJacobian() override;
 
  const SecondDerivativeRegularizationType _regularization_type;
  const Real _coefficient;
  const unsigned int _dim;
  const Real _lulu_factor;
  const GenericVariableSecond<is_ad> & _second_u;
  const VariableTestSecond & _second_test;
  const VariablePhiSecond & _second_phi;
 
  usingGenericKernelMembers;
};
 
using SecondDerivativeRegularization = SecondDerivativeRegularizationTempl<false>;
using ADSecondDerivativeRegularization = SecondDerivativeRegularizationTempl<true>;