Kernel.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 "KernelBase.h"
#include "MooseVariableInterface.h"
 
class Kernel : public KernelBase, public MooseVariableInterface<Real>
{
public:
  static InputParameters validParams();
 
  Kernel(const InputParameters & parameters);
 
  virtual void computeResidual() override;
 
  virtual void computeJacobian() override;
 
  virtual void computeOffDiagJacobian(unsigned int jvar) override;
 
  virtual void computeResidualAndJacobian() override;
 
  virtual void computeOffDiagJacobianScalar(unsigned int jvar) override;
 
  virtual const MooseVariable & variable() const override { return _var; }
 
protected:
  virtual Real computeQpResidual() = 0;
 
  virtual Real computeQpJacobian() { return 0; }
 
  virtual Real computeQpOffDiagJacobian(unsigned int /*jvar*/) { return 0; }
 
  virtual Real computeQpOffDiagJacobianScalar(unsigned int /*jvar*/) { return 0; }
 
  virtual RealEigenVector computeQpOffDiagJacobianArray(const ArrayMooseVariable & jvar)
  {
    return RealEigenVector::Zero(jvar.count());
  }
 
  MooseVariable & _var;
 
  const VariableTestValue & _test;
 
  const VariableTestGradient & _grad_test;
 
  const VariablePhiValue & _phi;
 
  const VariablePhiGradient & _grad_phi;
 
  const VariableValue & _u;
 
  const VariableGradient & _grad_u;
};