ScalarLagrangeMultiplier.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 "Kernel.h"

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

  ScalarLagrangeMultiplier(const InputParameters & parameters);
  virtual ~ScalarLagrangeMultiplier();

  virtual void computeOffDiagJacobianScalar(unsigned int jvar) override;

protected:
  virtual Real computeQpResidual() override;
  virtual Real computeQpOffDiagJacobianScalar(unsigned int jvar) override;

  unsigned int _lambda_var;

  const VariableValue & _lambda;
};