initializationindicator.hh

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#ifndef DUMUX_GRIDADAPTINITIALIZATIONINDICATOR_HH
#define DUMUX_GRIDADAPTINITIALIZATIONINDICATOR_HH
 
#include <memory>
#include <dune/geometry/type.hh>
#include <dumux/common/properties.hh>
#include <dumux/common/parameters.hh>
#include <dumux/common/deprecated.hh>
#include <dumux/discretization/method.hh>
 
namespace Dumux {

template<class TypeTag>
class GridAdaptInitializationIndicator
{
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using Problem = GetPropType<TypeTag, Properties::Problem>;
    using GridView = typename GetPropType<TypeTag, Properties::GridGeometry>::GridView;
    using Element = typename GridView::Traits::template Codim<0>::Entity;
 
    using GridVariables = GetPropType<TypeTag, Properties::GridVariables>;
    using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>;
    using BoundaryTypes = GetPropType<TypeTag, Properties::BoundaryTypes>;
 
    static constexpr bool isBox = GetPropType<TypeTag, Properties::GridGeometry>::discMethod == DiscretizationMethod::box;
 
public:

    GridAdaptInitializationIndicator(std::shared_ptr<const Problem> problem,
                                     std::shared_ptr<const GridGeometry> gridGeometry,
                                     std::shared_ptr<const GridVariables> gridVariables)
    : problem_(problem)
    , gridGeometry_(gridGeometry)
    , gridVariables_(gridVariables)
    , minLevel_(getParamFromGroup<int>(problem->paramGroup(), "Adaptive.MinLevel"))
    , maxLevel_(getParamFromGroup<int>(problem->paramGroup(), "Adaptive.MaxLevel"))
    , refineAtDirichletBC_(getParamFromGroup<bool>(problem->paramGroup(), "Adaptive.RefineAtDirichletBC", true))
    , refineAtFluxBC_(getParamFromGroup<bool>(problem->paramGroup(), "Adaptive.RefineAtFluxBC", true))
    , refineAtSource_(getParamFromGroup<bool>(problem->paramGroup(), "Adaptive.RefineAtSource", true))
    , eps_(getParamFromGroup<Scalar>(problem->paramGroup(), "Adaptive.BCRefinementThreshold", 1e-10))
    {}

    void setMinLevel(std::size_t minLevel)
    {
        minLevel_ = minLevel;
    }

    void setMaxLevel(std::size_t maxLevel)
    {
        maxLevel_ = maxLevel;
    }

    void setLevels(std::size_t minLevel, std::size_t maxLevel)
    {
        minLevel_ = minLevel;
        maxLevel_ = maxLevel;
    }

    void setRefinementAtDirichletBC(bool refine)
    {
        refineAtDirichletBC_ = refine;
    }

    void setRefinementAtSources(bool refine)
    {
        refineAtSource_ = refine;
    }

    void setRefinementAtFluxBoundaries(bool refine)
    {
        refineAtFluxBC_ = refine;
    }

    template<class SolutionVector>
    void calculate(const SolutionVector& sol)
    {
        indicatorVector_.assign(gridGeometry_->gridView().size(0), false);
 
        for (const auto& element : elements(gridGeometry_->gridView()))
        {
            const auto eIdx = gridGeometry_->elementMapper().index(element);

            if (element.level() < minLevel_)
            {
                indicatorVector_[eIdx] = true;
                continue; // proceed to the next element
            }
 
            // If refinement at sources/BCs etc is deactivated, skip the rest
            if (!refineAtSource_ && !refineAtFluxBC_ && !refineAtDirichletBC_)
                continue;
 
            // if the element is already on the maximum permissive level, skip rest
            if (element.level() == maxLevel_)
                continue;
 
            // get the fvGeometry and elementVolVars needed for the bc and source interfaces
            auto fvGeometry = localView(*gridGeometry_);
            fvGeometry.bind(element);
 
            auto elemVolVars = localView(gridVariables_->curGridVolVars());
            elemVolVars.bind(element, fvGeometry, sol);
 
            // elemFluxVarsCache for neumann interface
            auto elemFluxVarsCache = localView(gridVariables_->gridFluxVarsCache());
            elemFluxVarsCache.bind(element, fvGeometry, elemVolVars);

            if (refineAtSource_)
            {
                for (const auto& scv : scvs(fvGeometry))
                {
                    auto source = problem_->source(element, fvGeometry, elemVolVars, scv);
                    auto pointSource = problem_->scvPointSources(element, fvGeometry, elemVolVars, scv);
                    if (source.infinity_norm() + pointSource.infinity_norm() > eps_)
                    {
                        indicatorVector_[eIdx] = true;
                        break; // element is marked, escape scv loop
                    }
                }
            }

            if (!indicatorVector_[eIdx]                       // proceed if element is not already marked
                && element.hasBoundaryIntersections()         // proceed if element is on boundary
                && (refineAtDirichletBC_ || refineAtFluxBC_)) // proceed if boundary refinement is active
            {
                // cell-centered schemes
                if (!isBox)
                {
                    for (const auto& scvf : scvfs(fvGeometry))
                    {
                        // skip non-boundary scvfs
                        if (!scvf.boundary())
                            continue;
 
                        const auto bcTypes = problem_->boundaryTypes(element, scvf);
                        // We assume pure BCs, mixed boundary types are not allowed anyway!
                        if(bcTypes.hasOnlyDirichlet() && refineAtDirichletBC_)
                        {
                            indicatorVector_[eIdx] = true;
                            break; // element is marked, escape scvf loop
                        }
 
                        // we are on a pure Neumann boundary
                        else if(refineAtFluxBC_)
                        {
                            const auto fluxes = problem_->neumann(element, fvGeometry, elemVolVars, elemFluxVarsCache, scvf);
                            if (fluxes.infinity_norm() > eps_)
                            {
                                indicatorVector_[eIdx] = true;
                                break; // element is marked, escape scvf loop
                            }
                        }
                    }
                }
                // box-scheme
                else
                {
                    // container to store bcTypes
                    std::vector<BoundaryTypes> bcTypes(fvGeometry.numScv());
 
                    // Get bcTypes and maybe mark for refinement on Dirichlet boundaries
                    for (const auto& scv : scvs(fvGeometry))
                    {
                        bcTypes[scv.localDofIndex()] = problem_->boundaryTypes(element, scv);
                        if (refineAtDirichletBC_ && bcTypes[scv.localDofIndex()].hasDirichlet())
                        {
                            indicatorVector_[eIdx] = true;
                            break; // element is marked, escape scv loop
                        }
                    }
 
                    // If element hasn't been marked because of Dirichlet BCS, check Neumann BCs
                    if (!indicatorVector_[eIdx] && refineAtFluxBC_)
                    {
                        for (const auto& scvf : scvfs(fvGeometry))
                        {
                            if (scvf.boundary() && bcTypes[scvf.insideScvIdx()].hasNeumann())
                            {
                                const auto fluxes = problem_->neumann(element, fvGeometry, elemVolVars, elemFluxVarsCache, scvf);
                                if (fluxes.infinity_norm() > eps_)
                                {
                                    indicatorVector_[eIdx] = true;
                                    break; // element is marked, escape scvf loop
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    int operator() (const Element& element) const
    {
        if (indicatorVector_[gridGeometry_->elementMapper().index(element)])
            return 1;
        return 0;
    }
 
private:
    std::shared_ptr<const Problem> problem_;               
    std::shared_ptr<const GridGeometry> gridGeometry_; 
    std::shared_ptr<const GridVariables> gridVariables_;   
    std::vector<bool> indicatorVector_;                    
 
    int minLevel_;             
    int maxLevel_;             
    bool refineAtDirichletBC_; 
    bool refineAtFluxBC_;      
    bool refineAtSource_;      
    Scalar eps_;               
};
 
} // end namespace Dumux
 
#endif