Tempus_StepperNewmarkExplicitAForm_decl.hpp

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// @HEADER
// ****************************************************************************
//                Tempus: Copyright (2017) Sandia Corporation
//
// Distributed under BSD 3-clause license (See accompanying file Copyright.txt)
// ****************************************************************************
// @HEADER

#ifndef Tempus_StepperNewmarkExplicitAForm_decl_hpp
#define Tempus_StepperNewmarkExplicitAForm_decl_hpp

#include "Tempus_config.hpp"
#include "Tempus_StepperExplicit.hpp"
#include "Tempus_StepperNewmarkExplicitAFormAppAction.hpp"

namespace Tempus {

template <class Scalar>
class StepperNewmarkExplicitAForm
  : virtual public Tempus::StepperExplicit<Scalar> {
 public:
  StepperNewmarkExplicitAForm();

  StepperNewmarkExplicitAForm(
      const Teuchos::RCP<const Thyra::ModelEvaluator<Scalar> >& appModel,
      bool useFSAL, std::string ICConsistency, bool ICConsistencyCheck,
      Scalar gamma,
      const Teuchos::RCP<StepperNewmarkExplicitAFormAppAction<Scalar> >&
          stepperAppAction);

  virtual Teuchos::RCP<StepperNewmarkExplicitAFormAppAction<Scalar> >
  getAppAction() const
  {
    return stepperNewmarkExpAppAction_;
  }

  virtual void setInitialConditions(
      const Teuchos::RCP<SolutionHistory<Scalar> >& solutionHistory);

  virtual void takeStep(
      const Teuchos::RCP<SolutionHistory<Scalar> >& solutionHistory);

  virtual Teuchos::RCP<Tempus::StepperState<Scalar> > getDefaultStepperState();
  virtual Scalar getOrder() const
  {
    if (gamma_ == 0.5)
      return 2.0;
    else
      return 1.0;
  }
  virtual Scalar getOrderMin() const { return 1.0; }
  virtual Scalar getOrderMax() const { return 2.0; }
  virtual Scalar getInitTimeStep(
      const Teuchos::RCP<SolutionHistory<Scalar> >& /* solutionHistory */) const
  {
    return Scalar(1.0e+99);
  }

  virtual bool isExplicit() const { return true; }
  virtual bool isImplicit() const { return false; }
  virtual bool isExplicitImplicit() const
  {
    return isExplicit() && isImplicit();
  }
  virtual bool isOneStepMethod() const { return true; }
  virtual bool isMultiStepMethod() const { return !isOneStepMethod(); }
  virtual void setUseFSAL(bool a)
  {
    this->useFSAL_       = a;
    this->isInitialized_ = false;
  }
  virtual OrderODE getOrderODE() const { return SECOND_ORDER_ODE; }

  Teuchos::RCP<const Teuchos::ParameterList> getValidParameters() const;


  virtual void describe(Teuchos::FancyOStream& out,
                        const Teuchos::EVerbosityLevel verbLevel) const;

  virtual bool isValidSetup(Teuchos::FancyOStream& out) const;

  void predictVelocity(Thyra::VectorBase<Scalar>& vPred,
                       const Thyra::VectorBase<Scalar>& v,
                       const Thyra::VectorBase<Scalar>& a,
                       const Scalar dt) const;

  void predictDisplacement(Thyra::VectorBase<Scalar>& dPred,
                           const Thyra::VectorBase<Scalar>& d,
                           const Thyra::VectorBase<Scalar>& v,
                           const Thyra::VectorBase<Scalar>& a,
                           const Scalar dt) const;

  void correctVelocity(Thyra::VectorBase<Scalar>& v,
                       const Thyra::VectorBase<Scalar>& vPred,
                       const Thyra::VectorBase<Scalar>& a,
                       const Scalar dt) const;

  void setGamma(Scalar gamma)
  {
    gamma_ = gamma;

    TEUCHOS_TEST_FOR_EXCEPTION(
        (gamma_ > 1.0) || (gamma_ < 0.0), std::logic_error,
        "Error in 'Newmark Explicit a-Form' stepper: invalid value of Gamma = "
            << gamma_ << ".  Please select 0 <= Gamma <= 1. \n");

    this->isInitialized_ = false;
  }

  virtual void setAppAction(
      Teuchos::RCP<StepperNewmarkExplicitAFormAppAction<Scalar> > appAction);

 protected:
  Scalar gammaDefault_;
  Scalar gamma_;
  Teuchos::RCP<StepperNewmarkExplicitAFormAppAction<Scalar> >
      stepperNewmarkExpAppAction_;
};

// ------------------------------------------------------------------------
template <class Scalar>
Teuchos::RCP<StepperNewmarkExplicitAForm<Scalar> >
createStepperNewmarkExplicitAForm(
    const Teuchos::RCP<const Thyra::ModelEvaluator<Scalar> >& model,
    Teuchos::RCP<Teuchos::ParameterList> pl);

}  // namespace Tempus

#endif  // Tempus_StepperNewmarkExplicitAForm_decl_hpp