Panzer_ExplicitModelEvaluator.hpp

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// @HEADER
// *****************************************************************************
//           Panzer: A partial differential equation assembly
//       engine for strongly coupled complex multiphysics systems
//
// Copyright 2011 NTESS and the Panzer contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef PANZER_EXPLICIT_MODEL_EVALUATOR_HPP
#define PANZER_EXPLICIT_MODEL_EVALUATOR_HPP

#include "PanzerDiscFE_config.hpp"

#include "Thyra_ModelEvaluatorDelegatorBase.hpp"
#include "Thyra_BlockedLinearOpBase.hpp"

#include "Panzer_ModelEvaluator.hpp"

#ifdef PANZER_HAVE_EPETRA_STACK
#include "Panzer_ModelEvaluator_Epetra.hpp"
#endif

#include "Panzer_MassMatrixModelEvaluator.hpp"

namespace panzer {

template<typename Scalar>
class ExplicitModelEvaluator
  : public Thyra::ModelEvaluatorDelegatorBase<Scalar>,
    public panzer::MassMatrixModelEvaluator<Scalar> {
public:


  ExplicitModelEvaluator(const Teuchos::RCP<Thyra::ModelEvaluator<Scalar> > & model,
                         bool constantMassMatrix,
                         bool useLumpedMass,
                         bool applyMassInverse=true);


  Thyra::ModelEvaluatorBase::InArgs<Scalar> getNominalValues() const;

  Thyra::ModelEvaluatorBase::InArgs<Scalar> createInArgs() const;

  Thyra::ModelEvaluatorBase::OutArgs<Scalar> createOutArgs() const;

  Teuchos::RCP<panzer::ModelEvaluator<Scalar> > getPanzerUnderlyingModel();

  virtual void applyInverseMassMatrix(const Teuchos::RCP<Thyra::MultiVectorBase<Scalar> > input, const Teuchos::RCP<Thyra::MultiVectorBase<Scalar> > output) const
  {
    Thyra::apply(*invMassMatrix_,Thyra::NOTRANS,*input,output.ptr());
  }

  virtual void applyMassMatrix(const Teuchos::RCP<Thyra::MultiVectorBase<Scalar> > input, const Teuchos::RCP<Thyra::MultiVectorBase<Scalar> > output) const
  {
    Thyra::apply(*mass_,Thyra::NOTRANS,*input,output.ptr());
  }

private: // data members

  void applyDirichletBCs(const Teuchos::RCP<Thyra::VectorBase<Scalar> > & x,
                         const Teuchos::RCP<Thyra::VectorBase<Scalar> > & f) const
  {
    if(panzerModel_!=Teuchos::null)       { panzerModel_->applyDirichletBCs(x,f); return; }
#ifdef PANZER_HAVE_EPETRA_STACK
    if(panzerEpetraModel_!=Teuchos::null) { panzerEpetraModel_->applyDirichletBCs(x,f); return; }
#endif

    TEUCHOS_ASSERT(false);
  }

  void buildInverseMassMatrix(const Thyra::ModelEvaluatorBase::InArgs<Scalar> &inArgs) const;

  void buildArgsPrototypes();


  void evalModelImpl(const Thyra::ModelEvaluatorBase::InArgs<Scalar> &inArgs,
                     const Thyra::ModelEvaluatorBase::OutArgs<Scalar> &outArgs) const;


  void setOneTimeDirichletBeta(double beta,const Thyra::ModelEvaluator<Scalar> & me) const;

  bool constantMassMatrix_;

  bool massLumping_;

  Teuchos::RCP<const panzer::ModelEvaluator<Scalar> > panzerModel_;

#ifdef PANZER_HAVE_EPETRA_STACK
  Teuchos::RCP<const panzer::ModelEvaluator_Epetra> panzerEpetraModel_;
#endif

  mutable Teuchos::RCP<Thyra::LinearOpBase<Scalar> > mass_;
  mutable Teuchos::RCP<const Thyra::LinearOpBase<Scalar> > invMassMatrix_;
  mutable Teuchos::RCP<Thyra::VectorBase<Scalar> > scrap_f_;
  mutable Teuchos::RCP<Thyra::VectorBase<Scalar> > zero_;

  // build prototype in/out args
  Thyra::ModelEvaluatorBase::InArgs<Scalar> prototypeInArgs_;
  Thyra::ModelEvaluatorBase::OutArgs<Scalar> prototypeOutArgs_;

  // hide the default constructor
  ExplicitModelEvaluator();

};

} // end namespace panzer

#endif