limitPressure.C

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License
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#include "limitPressure.H"
#include "volFields.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
    defineTypeNameAndDebug(limitPressure, 0);
    addToRunTimeSelectionTable
    (
        fvConstraint,
        limitPressure,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::fv::limitPressure::readCoeffs(const dictionary& dict)
{
    pName_ = dict.lookupOrDefault<word>("p", "p");
 
    if (dict.found("min") && dict.found("max"))
    {
        pMin_.value() = dict.lookup<scalar>("min");
        limitMinP_ = true;
 
        pMax_.value() = dict.lookup<scalar>("max");
        limitMaxP_ = true;
    }
    else
    {
        const volScalarField& p = mesh().lookupObject<volScalarField>(pName_);
        const volScalarField::Boundary& pbf = p.boundaryField();
 
        bool pLimits = false;
        scalar pMin = vGreat;
        scalar pMax = -vGreat;
 
        forAll(pbf, patchi)
        {
            if
            (
                pbf[patchi].fixesValue()
             || isA<calculatedFvPatchField<scalar>>(pbf[patchi])
            )
            {
                pLimits = true;
 
                pMin = min(pMin, min(pbf[patchi]));
                pMax = max(pMax, max(pbf[patchi]));
            }
        }
 
        reduce(pLimits, andOp<bool>());
        if (pLimits)
        {
            reduce(pMax, maxOp<scalar>());
            reduce(pMin, minOp<scalar>());
        }
 
        if (dict.found("min"))
        {
            pMin_.value() = dict.lookup<scalar>("min");
            limitMinP_ = true;
        }
        else if (dict.found("minFactor"))
        {
            if (!pLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'minFactor' specified rather than 'min'" << nl
                    << "    but the corresponding reference pressure cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'min' rather than 'minFactor'"
                    << exit(FatalIOError);
            }
 
            const scalar pMinFactor(dict.lookup<scalar>("minFactor"));
            pMin_.value() = pMinFactor*pMin;
            limitMinP_ = true;
        }
 
        if (dict.found("max"))
        {
            pMax_.value() = dict.lookup<scalar>("max");
            limitMaxP_ = true;
        }
        else if (dict.found("maxFactor"))
        {
            if (!pLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'maxFactor' specified rather than 'max'" << nl
                    << "    but the corresponding reference pressure cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'max' rather than 'maxFactor'"
                    << exit(FatalIOError);
            }
 
            const scalar pMaxFactor(dict.lookup<scalar>("maxFactor"));
            pMax_.value() = pMaxFactor*pMax;
            limitMaxP_ = true;
        }
    }
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fv::limitPressure::limitPressure
(
    const word& name,
    const word& modelType,
    const fvMesh& mesh,
    const dictionary& dict
)
:
    fvConstraint(name, modelType, mesh, dict),
    pName_(word::null),
    pMin_("pMin", dimPressure, 0),
    pMax_("pMax", dimPressure, great),
    limitMinP_(false),
    limitMaxP_(false)
{
    readCoeffs(coeffs(dict));
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::wordList Foam::fv::limitPressure::constrainedFields() const
{
    return wordList(1, pName_);
}
 
 
bool Foam::fv::limitPressure::constrain(volScalarField& p) const
{
    bool constrained = false;
 
    if (limitMinP_ || limitMaxP_)
    {
        if (limitMinP_)
        {
            const scalar pMin = min(p).value();
 
            if (pMin < pMin_.value())
            {
                Info<< indent << "limitPressure: min " << pMin << endl;
                p = max(p, pMin_);
                constrained = true;
            }
        }
 
        if (limitMaxP_)
        {
            const scalar pMax = max(p).value();
 
            if (pMax > pMax_.value())
            {
                Info<< indent << "limitPressure: max " << pMax << endl;
                p = min(p, pMax_);
                constrained = true;
            }
        }
 
        p.correctBoundaryConditions();
    }
 
    return constrained;
}
 
 
bool Foam::fv::limitPressure::movePoints()
{
    return true;
}
 
 
void Foam::fv::limitPressure::topoChange(const polyTopoChangeMap&)
{}
 
 
void Foam::fv::limitPressure::mapMesh(const polyMeshMap&)
{}
 
 
void Foam::fv::limitPressure::distribute(const polyDistributionMap&)
{}
 
 
bool Foam::fv::limitPressure::read(const dictionary& dict)
{
    if (fvConstraint::read(dict))
    {
        readCoeffs(coeffs(dict));
        return true;
    }
    else
    {
        return false;
    }
}
 
 
// ************************************************************************* //