limitMag.C

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     \\/     M anipulation  |
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License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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\*---------------------------------------------------------------------------*/

#include "limitMag.H"
#include "volFields.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace fv
{
    defineTypeNameAndDebug(limitMag, 0);
    addToRunTimeSelectionTable
    (
        fvConstraint,
        limitMag,
        dictionary
    );
}
}


// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

void Foam::fv::limitMag::readCoeffs()
{
    fieldName_ = coeffs().lookup<word>("field");
    max_ = coeffs().lookup<scalar>("max");
}


template<class Type>
inline bool Foam::fv::limitMag::constrainType
(
    GeometricField<Type, fvPatchField, volMesh>& psi
) const
{
    const scalar maxSqrPsi = sqr(max_);

    Field<Type>& psiif = psi.primitiveFieldRef();

    const labelList& cells = set_.cells();

    forAll(cells, i)
    {
        const label celli = cells[i];

        const scalar magSqrPsii = magSqr(psiif[celli]);

        if (magSqrPsii > maxSqrPsi)
        {
            psiif[celli] *= sqrt(maxSqrPsi/magSqrPsii);
        }
    }

    // handle boundaries in the case of 'all'
    if (set_.selectionMode() == fvCellSet::selectionModeType::all)
    {
        typename GeometricField<Type, fvPatchField, volMesh>::Boundary& psibf =
            psi.boundaryFieldRef();

        forAll(psibf, patchi)
        {
            fvPatchField<Type>& psip = psibf[patchi];

            if (!psip.fixesValue())
            {
                forAll(psip, facei)
                {
                    const scalar magSqrPsii = magSqr(psip[facei]);

                    if (magSqrPsii > maxSqrPsi)
                    {
                        psip[facei] *= sqrt(maxSqrPsi/magSqrPsii);
                    }
                }
            }
        }
    }

    return cells.size();
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::fv::limitMag::limitMag
(
    const word& name,
    const word& modelType,
    const dictionary& dict,
    const fvMesh& mesh
)
:
    fvConstraint(name, modelType, dict, mesh),
    set_(coeffs(), mesh),
    fieldName_(word::null),
    max_(vGreat)
{
    readCoeffs();
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

Foam::wordList Foam::fv::limitMag::constrainedFields() const
{
    return wordList(1, fieldName_);
}


FOR_ALL_FIELD_TYPES
(
    IMPLEMENT_FV_CONSTRAINT_CONSTRAIN_FIELD,
    fv::limitMag
);


bool Foam::fv::limitMag::movePoints()
{
    set_.movePoints();
    return true;
}


void Foam::fv::limitMag::topoChange(const polyTopoChangeMap& map)
{
    set_.topoChange(map);
}


void Foam::fv::limitMag::mapMesh(const polyMeshMap& map)
{
    set_.mapMesh(map);
}


void Foam::fv::limitMag::distribute(const polyDistributionMap& map)
{
    set_.distribute(map);
}


bool Foam::fv::limitMag::read(const dictionary& dict)
{
    if (fvConstraint::read(dict))
    {
        set_.read(coeffs());
        readCoeffs();
        return true;
    }
    else
    {
        return false;
    }
}


// ************************************************************************* //