nonlinear/newtonconvergencewriter.hh

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#ifndef DUMUX_NEWTON_CONVERGENCE_WRITER_HH
#define DUMUX_NEWTON_CONVERGENCE_WRITER_HH
 
#include <string>
 
#include <dune/grid/io/file/vtk/vtksequencewriter.hh>
#include <dumux/discretization/method.hh>
 
namespace Dumux {
 
template <class SolutionVector>
struct ConvergenceWriterInterface
{
    virtual ~ConvergenceWriterInterface() = default;
 
    virtual void write(const SolutionVector &uLastIter, const SolutionVector &deltaU, const SolutionVector &residual) {}
};
 
template <class GridGeometry, class SolutionVector>
class NewtonConvergenceWriter : public ConvergenceWriterInterface<SolutionVector>
{
    using GridView = typename GridGeometry::GridView;
    static constexpr auto numEq = SolutionVector::block_type::dimension;
    using Scalar = typename SolutionVector::block_type::value_type;
 
    static_assert(GridGeometry::discMethod != DiscretizationMethods::staggered,
                  "This convergence writer does not work for the staggered method, use the StaggeredNewtonConvergenceWriter instead");
public:
    NewtonConvergenceWriter(const GridGeometry& gridGeometry,
                            const std::string& name = "newton_convergence")
    : gridGeometry_(gridGeometry)
    , writer_(gridGeometry.gridView(), name, "", "")
    {
        resize();
 
        if (GridGeometry::discMethod == DiscretizationMethods::box)
        {
            for (int eqIdx = 0; eqIdx < numEq; ++eqIdx)
            {
                writer_.addVertexData(x_[eqIdx], "x_" + std::to_string(eqIdx));
                writer_.addVertexData(delta_[eqIdx], "delta_" + std::to_string(eqIdx));
                writer_.addVertexData(def_[eqIdx], "defect_" + std::to_string(eqIdx));
            }
        }
        else
        {
            for (int eqIdx = 0; eqIdx < numEq; ++eqIdx)
            {
                writer_.addCellData(x_[eqIdx], "x_" + std::to_string(eqIdx));
                writer_.addCellData(delta_[eqIdx], "delta_" + std::to_string(eqIdx));
                writer_.addCellData(def_[eqIdx], "defect_" + std::to_string(eqIdx));
            }
        }
    }
 
    void resize()
    {
        const auto numDofs = gridGeometry_.numDofs();
 
        // resize the output fields
        for (int eqIdx = 0; eqIdx < numEq; ++eqIdx)
        {
            def_[eqIdx].resize(numDofs);
            delta_[eqIdx].resize(numDofs);
            x_[eqIdx].resize(numDofs);
        }
    }
 
    void reset(std::size_t newId = 0UL)
    { id_ = newId; iteration_ = 0UL; }
 
    void write(const SolutionVector& uLastIter,
               const SolutionVector& deltaU,
               const SolutionVector& residual) override
    {
        assert(uLastIter.size() == deltaU.size() && uLastIter.size() == residual.size());
 
        for (std::size_t dofIdxGlobal = 0; dofIdxGlobal < deltaU.size(); ++dofIdxGlobal)
        {
            for (int eqIdx = 0; eqIdx < numEq; ++eqIdx)
            {
                x_[eqIdx][dofIdxGlobal] = uLastIter[dofIdxGlobal][eqIdx];
                delta_[eqIdx][dofIdxGlobal] = - deltaU[dofIdxGlobal][eqIdx];
                def_[eqIdx][dofIdxGlobal] = residual[dofIdxGlobal][eqIdx];
            }
        }
 
        writer_.write(static_cast<double>(id_) + static_cast<double>(iteration_)/1000);
        ++iteration_;
    }
 
private:
    std::size_t id_ = 0UL;
    std::size_t iteration_ = 0UL;
 
    const GridGeometry& gridGeometry_;
 
    Dune::VTKSequenceWriter<GridView> writer_;
 
    std::array<std::vector<Scalar>, numEq> def_;
    std::array<std::vector<Scalar>, numEq> delta_;
    std::array<std::vector<Scalar>, numEq> x_;
};
 
} // end namespace Dumux
 
#endif