RASModel.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

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#include "RASModel.H"
#include <finiteVolume/wallFvPatch.H>
#include <OpenFOAM/addToRunTimeSelectionTable.H>

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

namespace Foam
{
namespace incompressible
{

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

defineTypeNameAndDebug(RASModel, 0);
defineRunTimeSelectionTable(RASModel, dictionary);
addToRunTimeSelectionTable(turbulenceModel, RASModel, turbulenceModel);

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

void RASModel::printCoeffs()
{
    if (printCoeffs_)
    {
        Info<< type() << "Coeffs" << coeffDict_ << endl;
    }
}


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

RASModel::RASModel
(
    const word& type,
    const volVectorField& U,
    const surfaceScalarField& phi,
    transportModel& lamTransportModel
)
:
    turbulenceModel(U, phi, lamTransportModel),

    IOdictionary
    (
        IOobject
        (
            "RASProperties",
            U.time().constant(),
            U.db(),
            IOobject::MUST_READ,
            IOobject::NO_WRITE
        )
    ),

    turbulence_(lookup("turbulence")),
    printCoeffs_(lookupOrDefault<Switch>("printCoeffs", false)),
    coeffDict_(subOrEmptyDict(type + "Coeffs")),

    k0_("k0", dimVelocity*dimVelocity, SMALL),
    epsilon0_("epsilon0", k0_.dimensions()/dimTime, SMALL),
    epsilonSmall_("epsilonSmall", epsilon0_.dimensions(), SMALL),
    omega0_("omega0", dimless/dimTime, SMALL),
    omegaSmall_("omegaSmall", omega0_.dimensions(), SMALL),

    y_(mesh_)
{
    k0_.readIfPresent(*this);
    epsilon0_.readIfPresent(*this);
    epsilonSmall_.readIfPresent(*this);
    omega0_.readIfPresent(*this);
    omegaSmall_.readIfPresent(*this);

    // Force the construction of the mesh deltaCoeffs which may be needed
    // for the construction of the derived models and BCs
    mesh_.deltaCoeffs();
}


// * * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * //

autoPtr<RASModel> RASModel::New
(
    const volVectorField& U,
    const surfaceScalarField& phi,
    transportModel& transport
)
{
    word modelName;

    // Enclose the creation of the dictionary to ensure it is deleted
    // before the turbulenceModel is created otherwise the dictionary is
    // entered in the database twice
    {
        IOdictionary dict
        (
            IOobject
            (
                "RASProperties",
                U.time().constant(),
                U.db(),
                IOobject::MUST_READ,
                IOobject::NO_WRITE
            )
        );

        dict.lookup("RASModel") >> modelName;
    }

    Info<< "Selecting RAS turbulence model " << modelName << endl;

    dictionaryConstructorTable::iterator cstrIter =
        dictionaryConstructorTablePtr_->find(modelName);

    if (cstrIter == dictionaryConstructorTablePtr_->end())
    {
        FatalErrorIn
        (
            "RASModel::New(const volVectorField&, "
            "const surfaceScalarField&, transportModel&)"
        )   << "Unknown RASModel type " << modelName
            << endl << endl
            << "Valid RASModel types are :" << endl
            << dictionaryConstructorTablePtr_->sortedToc()
            << exit(FatalError);
    }

    return autoPtr<RASModel>(cstrIter()(U, phi, transport));
}


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


scalar RASModel::yPlusLam(const scalar kappa, const scalar E) const
{
    scalar ypl = 11.0;

    for (int i=0; i<10; i++)
    {
        ypl = log(max(E*ypl, 1))/kappa;
    }

    return ypl;
}


tmp<scalarField> RASModel::yPlus(const label patchNo, const scalar Cmu) const
{
    const fvPatch& curPatch = mesh_.boundary()[patchNo];

    tmp<scalarField> tYp(new scalarField(curPatch.size()));
    scalarField& Yp = tYp();

    if (isA<wallFvPatch>(curPatch))
    {
        Yp = pow(Cmu, 0.25)
            *y_[patchNo]
            *sqrt(k()().boundaryField()[patchNo].patchInternalField())
            /nu().boundaryField()[patchNo];
    }
    else
    {
        WarningIn
        (
            "tmp<scalarField> RASModel::yPlus(const label patchNo) const"
        )   << "Patch " << patchNo << " is not a wall. Returning null field"
            << nl << endl;

        Yp.setSize(0);
    }

    return tYp;
}


void RASModel::correct()
{
    turbulenceModel::correct();

    if (turbulence_ && mesh_.changing())
    {
        y_.correct();
    }
}


bool RASModel::read()
{
    if (regIOobject::read())
    {
        lookup("turbulence") >> turbulence_;

        if (const dictionary* dictPtr = subDictPtr(type() + "Coeffs"))
        {
            coeffDict_ <<= *dictPtr;
        }

        k0_.readIfPresent(*this);
        epsilon0_.readIfPresent(*this);
        epsilonSmall_.readIfPresent(*this);
        omega0_.readIfPresent(*this);
        omegaSmall_.readIfPresent(*this);

        return true;
    }
    else
    {
        return false;
    }
}


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

} // End namespace incompressible
} // End namespace Foam

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