scalarTransport.C

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#include "scalarTransport.H"
#include "surfaceFields.H"
#include "fvmDdt.H"
#include "fvmDiv.H"
#include "fvmLaplacian.H"
#include "fvmSup.H"
#include "fvModels.H"
#include "fvConstraints.H"
#include "kinematicMomentumTransportModel.H"
#include "dynamicMomentumTransportModel.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace functionObjects
{
    defineTypeNameAndDebug(scalarTransport, 0);

    addToRunTimeSelectionTable
    (
        functionObject,
        scalarTransport,
        dictionary
    );
}
}


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

Foam::tmp<Foam::volScalarField> Foam::functionObjects::scalarTransport::D
(
    const surfaceScalarField& phi
) const
{
    typedef incompressible::momentumTransportModel icoModel;
    typedef compressible::momentumTransportModel cmpModel;

    word Dname("D" + s_.name());

    if (constantD_)
    {
        return volScalarField::New
        (
            Dname,
            mesh_,
            dimensionedScalar(Dname, phi.dimensions()/dimLength, D_)
        );
    }
    else if (mesh_.foundObject<icoModel>(momentumTransportModel::typeName))
    {
        const icoModel& model = mesh_.lookupObject<icoModel>
        (
            momentumTransportModel::typeName
        );

        return alphaD_*model.nu() + alphaDt_*model.nut();
    }
    else if (mesh_.foundObject<cmpModel>(momentumTransportModel::typeName))
    {
        const cmpModel& model = mesh_.lookupObject<cmpModel>
        (
            momentumTransportModel::typeName
        );

        return alphaD_*model.mu() + alphaDt_*model.mut();
    }
    else
    {
        return volScalarField::New
        (
            Dname,
            mesh_,
            dimensionedScalar(Dname, phi.dimensions()/dimLength, 0)
        );
    }
}


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

Foam::functionObjects::scalarTransport::scalarTransport
(
    const word& name,
    const Time& runTime,
    const dictionary& dict
)
:
    fvMeshFunctionObject(name, runTime, dict),
    fieldName_(dict.lookupOrDefault<word>("field", "s")),
    D_(0),
    nCorr_(0),
    s_
    (
        IOobject
        (
            fieldName_,
            mesh_.time().timeName(),
            mesh_,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        mesh_
    )
{
    read(dict);
}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::functionObjects::scalarTransport::~scalarTransport()
{}


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

bool Foam::functionObjects::scalarTransport::read(const dictionary& dict)
{
    fvMeshFunctionObject::read(dict);

    phiName_ = dict.lookupOrDefault<word>("phi", "phi");
    rhoName_ = dict.lookupOrDefault<word>("rho", "rho");
    schemesField_ = dict.lookupOrDefault<word>("schemesField", fieldName_);

    constantD_ = dict.readIfPresent("D", D_);
    alphaD_ = dict.lookupOrDefault("alphaD", 1.0);
    alphaDt_ = dict.lookupOrDefault("alphaDt", 1.0);

    dict.readIfPresent("nCorr", nCorr_);

    return true;
}


bool Foam::functionObjects::scalarTransport::execute()
{
    Info<< type() << " write:" << endl;

    const surfaceScalarField& phi =
        mesh_.lookupObject<surfaceScalarField>(phiName_);

    // Calculate the diffusivity
    volScalarField D("D" + s_.name(), this->D(phi));

    word divScheme("div(phi," + schemesField_ + ")");
    word laplacianScheme("laplacian(" + D.name() + "," + schemesField_ + ")");

    // Set under-relaxation coeff
    scalar relaxCoeff = 0.0;
    if (mesh_.relaxEquation(schemesField_))
    {
        relaxCoeff = mesh_.equationRelaxationFactor(schemesField_);
    }

    const Foam::fvModels& fvModels(Foam::fvModels::New(mesh_));
    const Foam::fvConstraints& fvConstraints
    (
        Foam::fvConstraints::New(mesh_)
    );

    if (phi.dimensions() == dimMass/dimTime)
    {
        const volScalarField& rho =
            mesh_.lookupObject<volScalarField>(rhoName_);

        for (int i=0; i<=nCorr_; i++)
        {
            fvScalarMatrix sEqn
            (
                fvm::ddt(rho, s_)
              + fvm::div(phi, s_, divScheme)
              - fvm::laplacian(D, s_, laplacianScheme)
             ==
                fvModels.source(rho, s_)
            );

            sEqn.relax(relaxCoeff);

            fvConstraints.constrain(sEqn);

            sEqn.solve(schemesField_);

            fvConstraints.constrain(s_);
        }
    }
    else if (phi.dimensions() == dimVolume/dimTime)
    {
        for (int i=0; i<=nCorr_; i++)
        {
            fvScalarMatrix sEqn
            (
                fvm::ddt(s_)
              + fvm::div(phi, s_, divScheme)
              - fvm::laplacian(D, s_, laplacianScheme)
             ==
                fvModels.source(s_)
            );

            sEqn.relax(relaxCoeff);

            fvConstraints.constrain(sEqn);

            sEqn.solve(schemesField_);

            fvConstraints.constrain(s_);
        }
    }
    else
    {
        FatalErrorInFunction
            << "Incompatible dimensions for phi: " << phi.dimensions() << nl
            << "Dimensions should be " << dimMass/dimTime << " or "
            << dimVolume/dimTime << exit(FatalError);
    }

    Info<< endl;

    return true;
}


bool Foam::functionObjects::scalarTransport::write()
{
    return true;
}


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