TimeStepControl.hpp

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/*
  Copyright 2014 IRIS AS
  Copyright 2015 Dr. Blatt - HPC-Simulation-Software & Services
  Copyright 2015 Statoil AS

  This file is part of the Open Porous Media project (OPM).

  OPM is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  OPM is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPM_TIMESTEPCONTROL_HEADER_INCLUDED
#define OPM_TIMESTEPCONTROL_HEADER_INCLUDED

#include <vector>

#include <boost/any.hpp>
#include <boost/range/iterator_range.hpp>
#include <opm/core/simulator/TimeStepControlInterface.hpp>
#include <opm/core/linalg/ParallelIstlInformation.hpp>

namespace Opm
{
    //
    class SimpleIterationCountTimeStepControl : public TimeStepControlInterface
    {
    public:
        //  \param decayrate          decayrate of time step when target iterations are not met (should be <= 1)
        //  \param growthrate         growthrate of time step when target iterations are not met (should be >= 1)
        SimpleIterationCountTimeStepControl( const int target_iterations,
                                             const double decayrate,
                                             const double growthrate,
                                             const bool verbose = false);

        double computeTimeStepSize( const double dt, const int iterations, const SimulatorState& state ) const;

    protected:
        const int     target_iterations_;
        const double  decayrate_;
        const double  growthrate_;
        const bool    verbose_;
    };

    class PIDTimeStepControl : public TimeStepControlInterface
    {
    public:
        PIDTimeStepControl( const double tol = 1e-3,
                            const boost::any& pinfo = boost::any(),
                            const bool verbose = false );

        void initialize( const SimulatorState& state );

        double computeTimeStepSize( const double dt, const int /* iterations */, const SimulatorState& state ) const;

    protected:
        template <class Iterator>
        double euclidianNormSquared( Iterator it, const Iterator end, int num_components = 1 ) const
        {
            static_cast<void>(num_components); // Suppress warning in the serial case.
#if HAVE_MPI
            if ( parallel_information_.type() == typeid(ParallelISTLInformation) )
            {
                const ParallelISTLInformation& info =
                    boost::any_cast<const ParallelISTLInformation&>(parallel_information_);
                int size_per_component = (end - it) / num_components;
                assert((end - it) == num_components * size_per_component);
                double component_product = 0.0;
                for( int i = 0; i < num_components; ++i )
                {
                    auto component_container =
                        boost::make_iterator_range(it + i * size_per_component,
                                                   it + (i + 1) * size_per_component);
                    info.computeReduction(component_container,
                                           Opm::Reduction::makeInnerProductFunctor<double>(),
                                           component_product);
                }
                return component_product;
            }
            else
#endif
            {
                double product = 0.0 ;
                for( ; it != end; ++it ) {
                    product += ( *it * *it );
                }
                return product;
            }
        }

    protected:
        mutable std::vector<double> p0_;
        mutable std::vector<double> sat0_;

        const double tol_;
        mutable std::vector< double > errors_;

        const bool verbose_;
    private:
        const boost::any parallel_information_;
    };

    //
    class PIDAndIterationCountTimeStepControl : public PIDTimeStepControl
    {
        typedef PIDTimeStepControl BaseType;
    public:
        //  \param maxgrowth  max growth factor for new time step in relation of old time step (default = 3.0)
        PIDAndIterationCountTimeStepControl( const int target_iterations = 20,
                                             const double tol = 1e-3,
                                             const boost::any& = boost::any(),
                                             const bool verbose = false);

        double computeTimeStepSize( const double dt, const int iterations, const SimulatorState& state ) const;

    protected:
        const int     target_iterations_;
    };


} // end namespace Opm
#endif