fvbaseelementcontext.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_FV_BASE_ELEMENT_CONTEXT_HH
#define EWOMS_FV_BASE_ELEMENT_CONTEXT_HH
 
#include "fvbaseproperties.hh"
 
#include <dune/common/fvector.hh>
 
#include <opm/models/discretization/common/fvbaseparameters.hh>
#include <opm/models/discretization/common/linearizationtype.hh>
 
#include <opm/models/utils/alignedallocator.hh>
 
#include <vector>
 
namespace Opm {
 
template<class TypeTag>
class FvBaseElementContext
{
    using Implementation = GetPropType<TypeTag, Properties::ElementContext>;
 
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using PrimaryVariables = GetPropType<TypeTag, Properties::PrimaryVariables>;
    using IntensiveQuantities = GetPropType<TypeTag, Properties::IntensiveQuantities>;
    using ExtensiveQuantities = GetPropType<TypeTag, Properties::ExtensiveQuantities>;
 
    // the history size of the time discretization in number of steps
    enum { timeDiscHistorySize = getPropValue<TypeTag, Properties::TimeDiscHistorySize>() };
 
    struct DofStore_ {
        IntensiveQuantities intensiveQuantities[timeDiscHistorySize];
        const PrimaryVariables* priVars[timeDiscHistorySize];
        const IntensiveQuantities *thermodynamicHint[timeDiscHistorySize];
    };
    using DofVarsVector = std::vector<DofStore_>;
    using ExtensiveQuantitiesVector = std::vector<ExtensiveQuantities>;
 
    using Simulator = GetPropType<TypeTag, Properties::Simulator>;
    using Problem = GetPropType<TypeTag, Properties::Problem>;
    using Model = GetPropType<TypeTag, Properties::Model>;
    using Stencil = GetPropType<TypeTag, Properties::Stencil>;
    using GradientCalculator = GetPropType<TypeTag, Properties::GradientCalculator>;
    using SolutionVector = GetPropType<TypeTag, Properties::SolutionVector>;
 
    using GridView = GetPropType<TypeTag, Properties::GridView>;
    using Element = typename GridView::template Codim<0>::Entity;
 
    static const unsigned dimWorld = GridView::dimensionworld;
    static const unsigned numEq = getPropValue<TypeTag, Properties::NumEq>();
 
    using CoordScalar = typename GridView::ctype;
    using GlobalPosition = Dune::FieldVector<CoordScalar, dimWorld>;
 
    // we don't allow copies of element contexts!
    FvBaseElementContext(const FvBaseElementContext& ) = delete;
 
public:
    explicit FvBaseElementContext(const Simulator& simulator)
        : gridView_(simulator.gridView())
        , stencil_(gridView_, simulator.model().dofMapper() )
    {
        // remember the simulator object
        simulatorPtr_ = &simulator;
        enableStorageCache_ = Parameters::Get<Parameters::EnableStorageCache>();
        stashedDofIdx_ = -1;
        focusDofIdx_ = -1;
    }
 
    static void *operator new(size_t size)
    { return aligned_alloc(alignof(FvBaseElementContext), size); }
 
    static void operator delete(void *ptr)
    { aligned_free(ptr); }
 
    void updateAll(const Element& elem)
    {
        asImp_().updateStencil(elem);
        asImp_().updateAllIntensiveQuantities();
        asImp_().updateAllExtensiveQuantities();
    }
 
    void updateStencil(const Element& elem)
    {
        // remember the current element
        elemPtr_ = &elem;
 
        // update the stencil. the center gradients are quite expensive to calculate and
        // most models don't need them, so that we only do this if the model explicitly
        // enables them
        stencil_.update(elem);
 
        // resize the arrays containing the flux and the volume variables
        dofVars_.resize(stencil_.numDof());
        extensiveQuantities_.resize(stencil_.numInteriorFaces());
    }
 
    void updatePrimaryStencil(const Element& elem)
    {
        // remember the current element
        elemPtr_ = &elem;
 
        // update the finite element geometry
        stencil_.updatePrimaryTopology(elem);
 
        dofVars_.resize(stencil_.numPrimaryDof());
    }
 
    void updateStencilTopology(const Element& elem)
    {
        // remember the current element
        elemPtr_ = &elem;
 
        // update the finite element geometry
        stencil_.updateTopology(elem);
    }
 
    void updateAllIntensiveQuantities()
    {
        if (!enableStorageCache_) {
            // if the storage cache is disabled, we need to calculate the storage term
            // from scratch, i.e. we need the intensive quantities of all of the history.
            for (unsigned timeIdx = 0; timeIdx < timeDiscHistorySize; ++ timeIdx)
                asImp_().updateIntensiveQuantities(timeIdx);
        }
        else
            // if the storage cache is enabled, we only need to recalculate the storage
            // term for the most recent point of history (i.e., for the current iterative
            // solution)
            asImp_().updateIntensiveQuantities(/*timeIdx=*/0);
    }
 
    void updateIntensiveQuantities(unsigned timeIdx)
    { updateIntensiveQuantities_(timeIdx, numDof(timeIdx)); }
 
    void updatePrimaryIntensiveQuantities(unsigned timeIdx)
    { updateIntensiveQuantities_(timeIdx, numPrimaryDof(timeIdx)); }
 
    void updateIntensiveQuantities(const PrimaryVariables& priVars, unsigned dofIdx, unsigned timeIdx)
    { asImp_().updateSingleIntQuants_(priVars, dofIdx, timeIdx); }
 
    void updateAllExtensiveQuantities()
    { asImp_().updateExtensiveQuantities(/*timeIdx=*/0); }
 
    void updateExtensiveQuantities(unsigned timeIdx)
    {
        gradientCalculator_.prepare(/*context=*/asImp_(), timeIdx);
 
        for (unsigned fluxIdx = 0; fluxIdx < numInteriorFaces(timeIdx); fluxIdx++) {
            extensiveQuantities_[fluxIdx].update(/*context=*/asImp_(),
                                                 /*localIndex=*/fluxIdx,
                                                 timeIdx);
        }
    }
 
    void setFocusDofIndex(unsigned dofIdx)
    { focusDofIdx_ = dofIdx; }
 
    unsigned focusDofIndex() const
    { return focusDofIdx_; }
 
    LinearizationType linearizationType() const
    { return this->model().linearizer().getLinearizationType(); }
 
    const Simulator& simulator() const
    { return *simulatorPtr_; }
 
    const Problem& problem() const
    { return simulatorPtr_->problem(); }
 
    const Model& model() const
    { return simulatorPtr_->model(); }
 
    const GridView& gridView() const
    { return gridView_; }
 
    const Element& element() const
    { return *elemPtr_; }
 
    size_t numDof(unsigned timeIdx) const
    { return stencil(timeIdx).numDof(); }
 
    size_t numPrimaryDof(unsigned timeIdx) const
    { return stencil(timeIdx).numPrimaryDof(); }
 
    size_t numInteriorFaces(unsigned timeIdx) const
    { return stencil(timeIdx).numInteriorFaces(); }
 
    size_t numBoundaryFaces(unsigned timeIdx) const
    { return stencil(timeIdx).numBoundaryFaces(); }
 
    const Stencil& stencil(unsigned) const
    { return stencil_; }
 
    decltype(auto) pos(unsigned dofIdx, unsigned) const
    { return stencil_.subControlVolume(dofIdx).globalPos(); }
 
    unsigned globalSpaceIndex(unsigned dofIdx, unsigned timeIdx) const
    { return stencil(timeIdx).globalSpaceIndex(dofIdx); }
 
 
    Scalar dofVolume(unsigned dofIdx, unsigned timeIdx) const
    { return stencil(timeIdx).subControlVolume(dofIdx).volume();  }
 
    Scalar dofTotalVolume(unsigned dofIdx, unsigned timeIdx) const
    { return model().dofTotalVolume(globalSpaceIndex(dofIdx, timeIdx)); }
 
    bool onBoundary() const
    { return element().hasBoundaryIntersections(); }
 
    const IntensiveQuantities& intensiveQuantities(unsigned dofIdx, unsigned timeIdx) const
    {
#ifndef NDEBUG
        assert(dofIdx < numDof(timeIdx));
 
        if (enableStorageCache_ && timeIdx != 0 && problem().recycleFirstIterationStorage())
            throw std::logic_error("If caching of the storage term is enabled, only the intensive quantities "
                                   "for the most-recent substep (i.e. time index 0) are available!");
#endif
 
        return dofVars_[dofIdx].intensiveQuantities[timeIdx];
    }
 
    const IntensiveQuantities *thermodynamicHint(unsigned dofIdx, unsigned timeIdx) const
    {
        assert(dofIdx < numDof(timeIdx));
        return dofVars_[dofIdx].thermodynamicHint[timeIdx];
    }
    IntensiveQuantities& intensiveQuantities(unsigned dofIdx, unsigned timeIdx)
    {
        assert(dofIdx < numDof(timeIdx));
        return dofVars_[dofIdx].intensiveQuantities[timeIdx];
    }
 
    const PrimaryVariables& primaryVars(unsigned dofIdx, unsigned timeIdx) const
    {
        assert(dofIdx < numDof(timeIdx));
        return *dofVars_[dofIdx].priVars[timeIdx];
    }
 
    bool haveStashedIntensiveQuantities() const
    { return stashedDofIdx_ != -1; }
 
    int stashedDofIdx() const
    { return stashedDofIdx_; }
 
    void stashIntensiveQuantities(unsigned dofIdx)
    {
        assert(dofIdx < numDof(/*timeIdx=*/0));
 
        intensiveQuantitiesStashed_ = dofVars_[dofIdx].intensiveQuantities[/*timeIdx=*/0];
        priVarsStashed_ = *dofVars_[dofIdx].priVars[/*timeIdx=*/0];
        stashedDofIdx_ = static_cast<int>(dofIdx);
    }
 
    void restoreIntensiveQuantities(unsigned dofIdx)
    {
        dofVars_[dofIdx].priVars[/*timeIdx=*/0] = &priVarsStashed_;
        dofVars_[dofIdx].intensiveQuantities[/*timeIdx=*/0] = intensiveQuantitiesStashed_;
        stashedDofIdx_ = -1;
    }
 
    const GradientCalculator& gradientCalculator() const
    { return gradientCalculator_; }
 
    const ExtensiveQuantities& extensiveQuantities(unsigned fluxIdx, unsigned) const
    { return extensiveQuantities_[fluxIdx]; }
 
    bool enableStorageCache() const
    { return enableStorageCache_; }
 
    void setEnableStorageCache(bool yesno)
    { enableStorageCache_ = yesno; }
 
private:
    Implementation& asImp_()
    { return *static_cast<Implementation*>(this); }
 
    const Implementation& asImp_() const
    { return *static_cast<const Implementation*>(this); }
 
protected:
    void updateIntensiveQuantities_(unsigned timeIdx, size_t numDof)
    {
        // update the intensive quantities for the whole history
        const SolutionVector& globalSol = model().solution(timeIdx);
 
        // update the non-gradient quantities
        for (unsigned dofIdx = 0; dofIdx < numDof; dofIdx++) {
            unsigned globalIdx = globalSpaceIndex(dofIdx, timeIdx);
            const PrimaryVariables& dofSol = globalSol[globalIdx];
            dofVars_[dofIdx].priVars[timeIdx] = &dofSol;
 
            dofVars_[dofIdx].thermodynamicHint[timeIdx] =
                model().thermodynamicHint(globalIdx, timeIdx);
 
            const auto *cachedIntQuants = model().cachedIntensiveQuantities(globalIdx, timeIdx);
            if (cachedIntQuants) {
                dofVars_[dofIdx].intensiveQuantities[timeIdx] = *cachedIntQuants;
            }
            else {
                updateSingleIntQuants_(dofSol, dofIdx, timeIdx);
                model().updateCachedIntensiveQuantities(dofVars_[dofIdx].intensiveQuantities[timeIdx],
                                                        globalIdx,
                                                        timeIdx);
            }
        }
    }
 
    void updateSingleIntQuants_(const PrimaryVariables& priVars, unsigned dofIdx, unsigned timeIdx)
    {
#ifndef NDEBUG
        if (enableStorageCache_ && timeIdx != 0 && problem().recycleFirstIterationStorage())
            throw std::logic_error("If caching of the storage term is enabled, only the intensive quantities "
                                   "for the most-recent substep (i.e. time index 0) are available!");
#endif
 
        dofVars_[dofIdx].priVars[timeIdx] = &priVars;
        dofVars_[dofIdx].intensiveQuantities[timeIdx].update(/*context=*/asImp_(), dofIdx, timeIdx);
    }
 
    IntensiveQuantities intensiveQuantitiesStashed_;
    PrimaryVariables priVarsStashed_;
 
    GradientCalculator gradientCalculator_;
 
    std::vector<DofStore_, aligned_allocator<DofStore_, alignof(DofStore_)> > dofVars_;
    std::vector<ExtensiveQuantities, aligned_allocator<ExtensiveQuantities, alignof(ExtensiveQuantities)> > extensiveQuantities_;
 
    const Simulator *simulatorPtr_;
    const Element *elemPtr_;
    const GridView gridView_;
    Stencil stencil_;
 
    int stashedDofIdx_;
    int focusDofIdx_;
    bool enableStorageCache_;
};
 
} // namespace Opm
 
#endif