pvsmodel.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
  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 2 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/>.

  Consult the COPYING file in the top-level source directory of this
  module for the precise wording of the license and the list of
  copyright holders.
*/
#ifndef EWOMS_PVS_MODEL_HH
#define EWOMS_PVS_MODEL_HH

#include <opm/common/Exceptions.hpp>

#include <opm/material/densead/Math.hpp>
#include <opm/material/fluidmatrixinteractions/MaterialTraits.hpp>
#include <opm/material/fluidmatrixinteractions/NullMaterial.hpp>

#include <opm/models/common/diffusionmodule.hh>
#include <opm/models/common/energymodule.hh>
#include <opm/models/common/multiphasebasemodel.hh>

#include <opm/models/io/vtkcompositionmodule.hpp>
#include <opm/models/io/vtkenergymodule.hpp>
#include <opm/models/io/vtkdiffusionmodule.hpp>
#include <opm/models/io/vtkphasepresencemodule.hpp>

#include <opm/models/pvs/pvsboundaryratevector.hh>
#include <opm/models/pvs/pvsextensivequantities.hh>
#include <opm/models/pvs/pvsindices.hh>
#include <opm/models/pvs/pvsintensivequantities.hh>
#include <opm/models/pvs/pvslocalresidual.hh>
#include <opm/models/pvs/pvsnewtonmethod.hh>
#include <opm/models/pvs/pvsprimaryvariables.hh>
#include <opm/models/pvs/pvsproperties.hh>
#include <opm/models/pvs/pvsratevector.hh>

#include <cassert>
#include <cstddef>
#include <iostream>
#include <memory>
#include <sstream>
#include <stdexcept>
#include <string>
#include <tuple>
#include <vector>

namespace Opm {

template <class TypeTag>
class PvsModel;

}

namespace Opm::Properties {

namespace TTag {

struct PvsModel
{ using InheritsFrom = std::tuple<MultiPhaseBaseModel>; };

} // namespace TTag

template<class TypeTag>
struct LocalResidual<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsLocalResidual<TypeTag>; };

template<class TypeTag>
struct NewtonMethod<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsNewtonMethod<TypeTag>; };

template<class TypeTag>
struct Model<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsModel<TypeTag>; };

template<class TypeTag>
struct PrimaryVariables<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsPrimaryVariables<TypeTag>; };

template<class TypeTag>
struct RateVector<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsRateVector<TypeTag>; };

template<class TypeTag>
struct BoundaryRateVector<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsBoundaryRateVector<TypeTag>; };

template<class TypeTag>
struct IntensiveQuantities<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsIntensiveQuantities<TypeTag>; };

template<class TypeTag>
struct ExtensiveQuantities<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsExtensiveQuantities<TypeTag>; };

template<class TypeTag>
struct Indices<TypeTag, TTag::PvsModel>
{ using type = Opm::PvsIndices<TypeTag, /*PVIdx=*/0>; };

template<class TypeTag>
struct EnableEnergy<TypeTag, TTag::PvsModel>
{ static constexpr bool value = false; };

// disable molecular diffusion by default
template<class TypeTag>
struct EnableDiffusion<TypeTag, TTag::PvsModel>
{ static constexpr bool value = false; };

template<class TypeTag>
struct PvsPressureBaseWeight<TypeTag, TTag::PvsModel>
{
    using type = GetPropType<TypeTag, Scalar>;
    static constexpr type value = 1.0;
};

template<class TypeTag>
struct PvsSaturationsBaseWeight<TypeTag, TTag::PvsModel>
{
    using type = GetPropType<TypeTag, Scalar>;
    static constexpr type value = 1.0;
};

template<class TypeTag>
struct PvsMoleFractionsBaseWeight<TypeTag, TTag::PvsModel>
{
    using type = GetPropType<TypeTag, Scalar>;
    static constexpr type value = 1.0;
};

} // namespace Opm::Properties

namespace Opm::Parameters {

struct PvsVerbosity
{ static constexpr int value = 1; };

} // namespace Opm::Parameters

namespace Opm {

template <class TypeTag>
class PvsModel
    : public MultiPhaseBaseModel<TypeTag>
{
    using ParentType = MultiPhaseBaseModel<TypeTag>;

    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using Simulator = GetPropType<TypeTag, Properties::Simulator>;
    using FluidSystem = GetPropType<TypeTag, Properties::FluidSystem>;
    using GridView = GetPropType<TypeTag, Properties::GridView>;

    using PrimaryVariables = GetPropType<TypeTag, Properties::PrimaryVariables>;
    using IntensiveQuantities = GetPropType<TypeTag, Properties::IntensiveQuantities>;
    using ElementContext = GetPropType<TypeTag, Properties::ElementContext>;
    using Indices = GetPropType<TypeTag, Properties::Indices>;

    enum { numPhases = getPropValue<TypeTag, Properties::NumPhases>() };
    enum { numComponents = getPropValue<TypeTag, Properties::NumComponents>() };
    static constexpr bool enableDiffusion = getPropValue<TypeTag, Properties::EnableDiffusion>();
    static constexpr bool enableEnergy = getPropValue<TypeTag, Properties::EnableEnergy>();

    using Element = typename GridView::template Codim<0>::Entity;
    using ElementIterator = typename GridView::template Codim<0>::Iterator;

    using EnergyModule = ::Opm::EnergyModule<TypeTag, enableEnergy>;

public:
    explicit PvsModel(Simulator& simulator)
        : ParentType(simulator)
    {
        verbosity_ = Parameters::Get<Parameters::PvsVerbosity>();
        numSwitched_ = 0;
    }

    static void registerParameters()
    {
        ParentType::registerParameters();

        // register runtime parameters of the VTK output modules
        VtkPhasePresenceModule<TypeTag>::registerParameters();
        VtkCompositionModule<TypeTag>::registerParameters();

        if constexpr (enableDiffusion) {
            VtkDiffusionModule<TypeTag>::registerParameters();
        }

        if constexpr (enableEnergy) {
            VtkEnergyModule<TypeTag>::registerParameters();
        }

        Parameters::Register<Parameters::PvsVerbosity>
            ("The verbosity level of the primary variable "
             "switching model");
    }

    static std::string name()
    { return "pvs"; }

    std::string primaryVarName(unsigned pvIdx) const
    {
        const std::string s = EnergyModule::primaryVarName(pvIdx);
        if (!s.empty()) {
            return s;
        }

        std::ostringstream oss;
        if (pvIdx == Indices::pressure0Idx) {
            oss << "pressure_" << FluidSystem::phaseName(/*phaseIdx=*/0);
        }
        else if (Indices::switch0Idx <= pvIdx &&
                 pvIdx < Indices::switch0Idx + numPhases - 1)
        {
            oss << "switch_" << pvIdx - Indices::switch0Idx;
        }
        else if (Indices::switch0Idx + numPhases - 1 <= pvIdx &&
                 pvIdx < Indices::switch0Idx + numComponents - 1)
        {
            oss << "auxMoleFrac^" << FluidSystem::componentName(pvIdx);
        } else {
            assert(false);
        }

        return oss.str();
    }

    std::string eqName(unsigned eqIdx) const
    {
        const std::string s = EnergyModule::eqName(eqIdx);
        if (!s.empty()) {
            return s;
        }

        std::ostringstream oss;
        if (Indices::conti0EqIdx <= eqIdx &&
            eqIdx < Indices::conti0EqIdx + numComponents)
        {
            const unsigned compIdx = eqIdx - Indices::conti0EqIdx;
            oss << "continuity^" << FluidSystem::componentName(compIdx);
        }
        else {
            assert(false);
        }

        return oss.str();
    }

    void updateFailed()
    {
        ParentType::updateFailed();
        numSwitched_ = 0;
    }

    void updateBegin()
    {
        ParentType::updateBegin();

        // find the a reference pressure. The first degree of freedom
        // might correspond to non-interior entities which would lead
        // to an undefined value, so we have to iterate...
        const std::size_t nDof = this->numTotalDof();
        for (unsigned dofIdx = 0; dofIdx < nDof; ++dofIdx) {
            if (this->dofTotalVolume(dofIdx) > 0.0) {
                referencePressure_ =
                    this->solution(/*timeIdx=*/0)[dofIdx][/*pvIdx=*/Indices::pressure0Idx];
                if (referencePressure_ > 0.0) {
                    break;
                }
            }
        }
    }

    Scalar primaryVarWeight(unsigned globalDofIdx, unsigned pvIdx) const
    {
        const Scalar tmp = EnergyModule::primaryVarWeight(*this, globalDofIdx, pvIdx);
        if (tmp > 0) {
            // energy related quantity
            return tmp;
        }

        if (Indices::pressure0Idx == pvIdx) {
            return 10 / referencePressure_;
        }

        if (Indices::switch0Idx <= pvIdx &&
            pvIdx < Indices::switch0Idx + numPhases - 1)
        {
            const unsigned phaseIdx = pvIdx - Indices::switch0Idx;

            if (!this->solution(/*timeIdx=*/0)[globalDofIdx].phaseIsPresent(phaseIdx)) {
                // for saturations, the weight is always 1
                return 1;
            }

            // for saturations, the PvsMoleSaturationsBaseWeight
            // property determines the weight
            return getPropValue<TypeTag, Properties::PvsSaturationsBaseWeight>();
        }

        // for mole fractions, the PvsMoleFractionsBaseWeight
        // property determines the weight
        return getPropValue<TypeTag, Properties::PvsMoleFractionsBaseWeight>();
    }

    Scalar eqWeight(unsigned globalDofIdx, unsigned eqIdx) const
    {
        const Scalar tmp = EnergyModule::eqWeight(*this, globalDofIdx, eqIdx);
        if (tmp > 0) {
            // energy related equation
            return tmp;
        }

        const unsigned compIdx = eqIdx - Indices::conti0EqIdx;
        assert(compIdx <= numComponents);

        // make all kg equal
        return FluidSystem::molarMass(compIdx);
    }

    void advanceTimeLevel()
    {
        ParentType::advanceTimeLevel();
        numSwitched_ = 0;
    }

    bool switched() const
    { return numSwitched_ > 0; }

    template <class DofEntity>
    void serializeEntity(std::ostream& outstream, const DofEntity& dofEntity)
    {
        // write primary variables
        ParentType::serializeEntity(outstream, dofEntity);

        const unsigned dofIdx = static_cast<unsigned>(this->dofMapper().index(dofEntity));
        if (!outstream.good()) {
            throw std::runtime_error("Could not serialize DOF " + std::to_string(dofIdx));
        }

        outstream << this->solution(/*timeIdx=*/0)[dofIdx].phasePresence() << " ";
    }

    template <class DofEntity>
    void deserializeEntity(std::istream& instream, const DofEntity& dofEntity)
    {
        // read primary variables
        ParentType::deserializeEntity(instream, dofEntity);

        // read phase presence
        const unsigned dofIdx = static_cast<unsigned>(this->dofMapper().index(dofEntity));
        if (!instream.good()) {
            throw std::runtime_error("Could not deserialize DOF " + std::to_string(dofIdx));
        }

        short tmp;
        instream >> tmp;
        this->solution(/*timeIdx=*/0)[dofIdx].setPhasePresence(tmp);
        this->solution(/*timeIdx=*/1)[dofIdx].setPhasePresence(tmp);
    }

    void switchPrimaryVars_()
    {
        numSwitched_ = 0;

        int succeeded;
        try {
            std::vector<bool> visited(this->numGridDof(), false);
            ElementContext elemCtx(this->simulator_);

            for (const auto& elem : elements(this->gridView_, Dune::Partitions::interior)) {
                elemCtx.updateStencil(elem);

                const std::size_t numLocalDof = elemCtx.stencil(/*timeIdx=*/0).numPrimaryDof();
                for (unsigned dofIdx = 0; dofIdx < numLocalDof; ++dofIdx) {
                    unsigned globalIdx = elemCtx.globalSpaceIndex(dofIdx, /*timeIdx=*/0);

                    if (visited[globalIdx]) {
                        continue;
                    }
                    visited[globalIdx] = true;

                    // compute the intensive quantities of the current degree of freedom
                    auto& priVars = this->solution(/*timeIdx=*/0)[globalIdx];
                    elemCtx.updateIntensiveQuantities(priVars, dofIdx, /*timeIdx=*/0);
                    const IntensiveQuantities& intQuants = elemCtx.intensiveQuantities(dofIdx, /*timeIdx=*/0);

                    // evaluate primary variable switch
                    const short oldPhasePresence = priVars.phasePresence();

                    // set the primary variables and the new phase state
                    // from the current fluid state
                    priVars.assignNaive(intQuants.fluidState());

                    if (oldPhasePresence != priVars.phasePresence()) {
                        if (verbosity_ > 1) {
                            printSwitchedPhases_(elemCtx,
                                                 dofIdx,
                                                 intQuants.fluidState(),
                                                 oldPhasePresence,
                                                 priVars);
                        }
                        ++numSwitched_;
                    }
                }
            }

            succeeded = 1;
        }
        catch (...)
        {
            std::cout << "rank " << this->simulator_.gridView().comm().rank()
                      << " caught an exception during primary variable switching"
                      << "\n"  << std::flush;
            succeeded = 0;
        }
        succeeded = this->simulator_.gridView().comm().min(succeeded);

        if (!succeeded) {
            throw NumericalProblem("A process did not succeed in adapting the primary variables");
        }

        // make sure that if there was a variable switch in an
        // other partition we will also set the switch flag
        // for our partition.
        numSwitched_ = this->gridView_.comm().sum(numSwitched_);

        if (verbosity_ > 0) {
            this->simulator_.model().newtonMethod().endIterMsg()
                << ", num switched=" << numSwitched_;
        }
    }

    template <class FluidState>
    void printSwitchedPhases_(const ElementContext& elemCtx,
                              unsigned dofIdx,
                              const FluidState& fs,
                              short oldPhasePresence,
                              const PrimaryVariables& newPv) const
    {
        using FsToolbox = MathToolbox<typename FluidState::ValueType>;

        for (unsigned phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx) {
            const bool oldPhasePresent = (oldPhasePresence & (1 << phaseIdx)) > 0;
            const bool newPhasePresent = newPv.phaseIsPresent(phaseIdx);
            if (oldPhasePresent == newPhasePresent) {
                continue;
            }

            const auto& pos = elemCtx.pos(dofIdx, /*timeIdx=*/0);
            if (oldPhasePresent) {
                std::cout << "'" << FluidSystem::phaseName(phaseIdx)
                          << "' phase disappears at position " << pos
                          << ". saturation=" << fs.saturation(phaseIdx)
                          << std::flush;
            }
            else {
                Scalar sumx = 0;
                for (unsigned compIdx = 0; compIdx < numComponents; ++compIdx) {
                    sumx += FsToolbox::value(fs.moleFraction(phaseIdx, compIdx));
                }

                std::cout << "'" << FluidSystem::phaseName(phaseIdx)
                          << "' phase appears at position " << pos
                          << " sum x = " << sumx  << std::flush;
            }
        }

        std::cout << ", new primary variables: ";
        newPv.print(std::cout);
        std::cout << "\n"  << std::flush;
    }

    void registerOutputModules_()
    {
        ParentType::registerOutputModules_();

        // add the VTK output modules which are meaningful for the model
        this->addOutputModule(std::make_unique<VtkPhasePresenceModule<TypeTag>>(this->simulator_));
        this->addOutputModule(std::make_unique<VtkCompositionModule<TypeTag>>(this->simulator_));
        if constexpr (enableDiffusion) {
            this->addOutputModule(std::make_unique<VtkDiffusionModule<TypeTag>>(this->simulator_));
        }
        if constexpr (enableEnergy) {
            this->addOutputModule(std::make_unique<VtkEnergyModule<TypeTag>>(this->simulator_));
        }
    }

    Scalar referencePressure_{};

    // number of switches of the phase state in the last Newton
    // iteration
    unsigned numSwitched_;

    // verbosity of the model
    int verbosity_;
};

} // namespace Opm

#endif