pointLinear.C

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    Copyright (C) 2011-2016 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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#include "pointLinear.H"
#include "fvMesh.H"
#include "volPointInterpolation.H"
#include "triangle.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class Type>
Foam::tmp<Foam::GeometricField<Type, Foam::fvsPatchField, Foam::surfaceMesh>>
Foam::pointLinear<Type>::
correction
(
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    const fvMesh& mesh = this->mesh();
 
    GeometricField<Type, pointPatchField, pointMesh> pvf
    (
        volPointInterpolation::New(mesh).interpolate(vf)
    );
 
    tmp<GeometricField<Type, fvsPatchField, surfaceMesh>> tsfCorr =
        linearInterpolate(vf);
 
    Field<Type>& sfCorr = tsfCorr.ref().primitiveFieldRef();
 
    const pointField& points = mesh.points();
    const pointField& C = mesh.C();
    const faceList& faces = mesh.faces();
    const scalarField& w = mesh.weights();
    const labelList& owner = mesh.owner();
    const labelList& neighbour = mesh.neighbour();
 
    forAll(sfCorr, facei)
    {
        point pi =
            w[owner[facei]]*C[owner[facei]]
          + (1.0 - w[owner[facei]])*C[neighbour[facei]];
 
        const face& f = faces[facei];
 
        scalar at = triangle<point, const point&>
        (
            pi,
            points[f[0]],
            points[f[f.size()-1]]
        ).mag();
 
        scalar sumAt = at;
        Type sumPsip = at*(1.0/3.0)*
        (
            sfCorr[facei]
          + pvf[f[0]]
          + pvf[f[f.size()-1]]
        );
 
        for (label pointi=1; pointi<f.size(); pointi++)
        {
            at = triangle<point, const point&>
            (
                pi,
                points[f[pointi]],
                points[f[pointi-1]]
            ).mag();
 
            sumAt += at;
            sumPsip += at*(1.0/3.0)*
            (
                sfCorr[facei]
              + pvf[f[pointi]]
              + pvf[f[pointi-1]]
            );
 
        }
 
        sfCorr[facei] = sumPsip/sumAt - sfCorr[facei];
    }
 
 
    typename GeometricField<Type, fvsPatchField, surfaceMesh>::
        Boundary& bSfCorr = tsfCorr.ref().boundaryFieldRef();
 
    forAll(bSfCorr, patchi)
    {
        fvsPatchField<Type>& pSfCorr = bSfCorr[patchi];
 
        if (pSfCorr.coupled())
        {
            const fvPatch& fvp = mesh.boundary()[patchi];
            const scalarField& pWghts = mesh.weights().boundaryField()[patchi];
            const labelUList& pOwner = fvp.faceCells();
            const vectorField& pNbrC = mesh.C().boundaryField()[patchi];
 
            forAll(pOwner, facei)
            {
                label own = pOwner[facei];
 
                point pi =
                    pWghts[facei]*C[own]
                  + (1.0 - pWghts[facei])*pNbrC[facei];
 
                const face& f = faces[facei+fvp.start()];
 
                scalar at = triangle<point, const point&>
                (
                    pi,
                    points[f[0]],
                    points[f[f.size()-1]]
                ).mag();
 
                scalar sumAt = at;
                Type sumPsip = at*(1.0/3.0)*
                (
                    pSfCorr[facei]
                  + pvf[f[0]]
                  + pvf[f[f.size()-1]]
                );
 
                for (label pointi=1; pointi<f.size(); pointi++)
                {
                    at = triangle<point, const point&>
                    (
                        pi,
                        points[f[pointi]],
                        points[f[pointi-1]]
                    ).mag();
 
                    sumAt += at;
                    sumPsip += at*(1.0/3.0)*
                    (
                        pSfCorr[facei]
                      + pvf[f[pointi]]
                      + pvf[f[pointi-1]]
                    );
 
                }
 
                pSfCorr[facei] = sumPsip/sumAt - pSfCorr[facei];
            }
        }
        else
        {
            pSfCorr = Zero;
        }
    }
 
    return tsfCorr;
}
 
 
namespace Foam
{
    makeSurfaceInterpolationScheme(pointLinear);
}
 
// ************************************************************************* //