VectorKernel.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 VectorKernel : public KernelBase, public MooseVariableInterface<RealVectorValue>
{
public:
  static InputParameters validParams();

  VectorKernel(const InputParameters & parameters);

  virtual void computeResidual() override;

  virtual void computeJacobian() override;

  virtual void computeOffDiagJacobian(unsigned int jvar) override;

  virtual void computeOffDiagJacobianScalar(unsigned int jvar) override;

  virtual const VectorMooseVariable & 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; }

  const VectorMooseVariable & _var;

  const VectorVariableTestValue & _test;

  const VectorVariableTestGradient & _grad_test;

  const VectorVariablePhiValue & _phi;

  const VectorVariablePhiGradient & _grad_phi;

  const VectorVariableValue & _u;

  const VectorVariableGradient & _grad_u;
};