solidmechanics/plate/membrane/localresidual.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:
//
// SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_MEMBRANE_PLATE_LOCAL_RESIDUAL_HH
#define DUMUX_MEMBRANE_PLATE_LOCAL_RESIDUAL_HH
 
#include <dumux/common/properties.hh>
#include <dumux/common/numeqvector.hh>
 
#include <dumux/discretization/defaultlocaloperator.hh>
 
namespace Dumux {
 
template<class TypeTag>
class MembranePlateLocalResidual
: public DiscretizationDefaultLocalOperator<TypeTag>
{
    using ParentType = DiscretizationDefaultLocalOperator<TypeTag>;
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using Problem = GetPropType<TypeTag, Properties::Problem>;
    using NumEqVector = Dumux::NumEqVector<GetPropType<TypeTag, Properties::PrimaryVariables>>;
    using VolumeVariables = GetPropType<TypeTag, Properties::VolumeVariables>;
    using ElementVolumeVariables = typename GetPropType<TypeTag, Properties::GridVolumeVariables>::LocalView;
    using ElementFluxVariablesCache = typename GetPropType<TypeTag, Properties::GridFluxVariablesCache>::LocalView;
    using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>;
    using FVElementGeometry = typename GridGeometry::LocalView;
    using SubControlVolume = typename GridGeometry::SubControlVolume;
    using SubControlVolumeFace = typename GridGeometry::SubControlVolumeFace;
    using GridView = typename GridGeometry::GridView;
    using Element = typename GridView::template Codim<0>::Entity;
    using ModelTraits = GetPropType<TypeTag, Properties::ModelTraits>;
    using Indices = typename ModelTraits::Indices;
 
public:
    using ParentType::ParentType;
    using ElementResidualVector = typename ParentType::ElementResidualVector;
 
    NumEqVector computeStorage(const Problem& problem,
                               const SubControlVolume& scv,
                               const VolumeVariables& volVars) const
    {
        // so far we only implement the equilibrium equation
        return NumEqVector(0.0);
    }
 
    NumEqVector computeFlux(const Problem& problem,
                            const Element& element,
                            const FVElementGeometry& fvGeometry,
                            const ElementVolumeVariables& elemVolVars,
                            const SubControlVolumeFace& scvf,
                            const ElementFluxVariablesCache& elemFluxVarsCache) const
    {
        const auto& fluxVarCache = elemFluxVarsCache[scvf];
        Scalar gradWn = 0.0;
        for (const auto& scv : scvs(fvGeometry))
            gradWn += elemVolVars[scv].deformation()
                      * (fluxVarCache.gradN(scv.indexInElement()) * scvf.unitOuterNormal());
 
        const auto tension = problem.spatialParams().tension(scvf.ipGlobal());
 
        NumEqVector flux(0.0);
        flux[Indices::deformationEqIdx] = tension * gradWn * scvf.area();
        return flux;
    }
};
 
} // end namespace Dumux
 
#endif