pressureControl.C

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#include "pressureControl.H"
#include "findRefCell.H"

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

Foam::pressureControl::pressureControl
(
    const volScalarField& p,
    const volScalarField& pRef,
    const volScalarField& rho,
    const dictionary& dict,
    const bool pRefRequired
)
:
    refCell_(-1),
    refValue_(0),
    pMax_("pMax", dimPressure, great),
    pMin_("pMin", dimPressure, 0),
    limitMaxP_(false),
    limitMinP_(false)
{
    bool pLimits = false;
    scalar pMax = -great;
    scalar pMin = great;

    // Set the reference cell and value for closed domain simulations
    if (pRefRequired && setRefCell(p, pRef, dict, refCell_, refValue_))
    {
        pLimits = true;

        pMax = refValue_;
        pMin = refValue_;
    }

    if (dict.found("pMax") && dict.found("pMin"))
    {
        pMax_.value() = dict.lookup<scalar>("pMax");
        limitMaxP_ = true;
        pMin_.value() = dict.lookup<scalar>("pMin");
        limitMinP_ = true;
    }
    else
    {
        const volScalarField::Boundary& pbf = p.boundaryField();
        const volScalarField::Boundary& rhobf = rho.boundaryField();

        scalar rhoRefMax = -great;
        scalar rhoRefMin = great;
        bool rhoLimits = false;

        forAll(pbf, patchi)
        {
            if (pbf[patchi].fixesValue())
            {
                pLimits = true;
                rhoLimits = true;

                pMax = max(pMax, max(pbf[patchi]));
                pMin = min(pMin, min(pbf[patchi]));

                rhoRefMax = max(rhoRefMax, max(rhobf[patchi]));
                rhoRefMin = min(rhoRefMin, min(rhobf[patchi]));
            }
        }

        reduce(rhoLimits, andOp<bool>());
        if (rhoLimits)
        {
            reduce(pMax, maxOp<scalar>());
            reduce(pMin, minOp<scalar>());

            reduce(rhoRefMax, maxOp<scalar>());
            reduce(rhoRefMin, minOp<scalar>());
        }

        if (dict.found("pMax"))
        {
            pMax_.value() = dict.lookup<scalar>("pMax");
            limitMaxP_ = true;
        }
        else if (dict.found("pMaxFactor"))
        {
            if (!pLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'pMaxFactor' specified rather than 'pMax'" << nl
                    << "    but the corresponding reference pressure cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'pMax' rather than 'pMaxFactor'"
                    << exit(FatalIOError);
            }

            const scalar pMaxFactor(dict.lookup<scalar>("pMaxFactor"));
            pMax_.value() = pMaxFactor*pMax;
            limitMaxP_ = true;
        }
        else if (dict.found("rhoMax"))
        {
            // For backward-compatibility infer the pMax from rhoMax

            IOWarningInFunction(dict)
                 << "'rhoMax' specified rather than 'pMax' or 'pMaxFactor'"
                 << nl
                 << "    This is supported for backward-compatibility but "
                    "'pMax' or 'pMaxFactor' are more reliable." << endl;

            if (!pLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'rhoMax' specified rather than 'pMax'" << nl
                    << "    but the corresponding reference pressure cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'pMax' rather than 'rhoMax'"
                    << exit(FatalIOError);
            }

            if (!rhoLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'rhoMax' specified rather than 'pMaxFactor'" << nl
                    << "    but the corresponding reference density cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'pMaxFactor' rather than 'rhoMax'"
                    << exit(FatalIOError);
            }

            dimensionedScalar rhoMax("rhoMax", dimDensity, dict);

            pMax_.value() = max(rhoMax.value()/rhoRefMax, 1)*pMax;
            limitMaxP_ = true;
        }

        if (dict.found("pMin"))
        {
            pMin_.value() = dict.lookup<scalar>("pMin");
            limitMinP_ = true;
        }
        else if (dict.found("pMinFactor"))
        {
            if (!pLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'pMinFactor' specified rather than 'pMin'" << nl
                    << "    but the corresponding reference pressure cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'pMin' rather than 'pMinFactor'"
                    << exit(FatalIOError);
            }

            const scalar pMinFactor(dict.lookup<scalar>("pMinFactor"));
            pMin_.value() = pMinFactor*pMin;
            limitMinP_ = true;
        }
        else if (dict.found("rhoMin"))
        {
            // For backward-compatibility infer the pMin from rhoMin

            IOWarningInFunction(dict)
                << "'rhoMin' specified rather than 'pMin' or 'pMinFactor'" << nl
                << "    This is supported for backward-compatibility but"
                   "'pMin' or 'pMinFactor' are more reliable." << endl;

            if (!pLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'rhoMin' specified rather than 'pMin'" << nl
                    << "    but the corresponding reference pressure cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'pMin' rather than 'rhoMin'"
                    << exit(FatalIOError);
            }

            if (!rhoLimits)
            {
                FatalIOErrorInFunction(dict)
                    << "'rhoMin' specified rather than 'pMinFactor'" << nl
                    << "    but the corresponding reference density cannot"
                       " be evaluated from the boundary conditions." << nl
                    << "    Please specify 'pMinFactor' rather than 'rhoMin'"
                    << exit(FatalIOError);
            }

            dimensionedScalar rhoMin("rhoMin", dimDensity, dict);

            pMin_.value() = min(rhoMin.value()/rhoRefMin, 1)*pMin;
            limitMinP_ = true;
        }
    }

    if (limitMaxP_ || limitMinP_)
    {
        Info<< "pressureControl" << nl;

        if (limitMaxP_)
        {
            Info<< "    pMax " << pMax_.value() << nl;
        }

        if (limitMinP_)
        {
            Info<< "    pMin " << pMin_.value() << nl;
        }

        Info << endl;
    }
}


Foam::pressureControl::pressureControl
(
    const volScalarField& p,
    const volScalarField& rho,
    const dictionary& dict,
    const bool pRefRequired
)
:
    pressureControl(p, p, rho, dict, pRefRequired)
{}


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

bool Foam::pressureControl::limit(volScalarField& p) const
{
    if (limitMaxP_ || limitMinP_)
    {
        if (limitMaxP_)
        {
            const scalar pMax = max(p).value();

            if (pMax > pMax_.value())
            {
                Info<< "pressureControl: p max " << pMax << endl;
                p = min(p, pMax_);
            }
        }

        if (limitMinP_)
        {
            const scalar pMin = min(p).value();

            if (pMin < pMin_.value())
            {
                Info<< "pressureControl: p min " << pMin << endl;
                p = max(p, pMin_);
            }
        }

        p.correctBoundaryConditions();

        return true;
    }
    else
    {
        return false;
    }
}


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