BirdCarreau.C

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#include "BirdCarreau.H"
#include <OpenFOAM/addToRunTimeSelectionTable.H>
#include <finiteVolume/surfaceFields.H>

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

namespace Foam
{
namespace viscosityModels
{
    defineTypeNameAndDebug(BirdCarreau, 0);
    addToRunTimeSelectionTable
    (
        viscosityModel,
        BirdCarreau,
        dictionary
    );
}
}


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

Foam::tmp<Foam::volScalarField>
Foam::viscosityModels::BirdCarreau::calcNu() const
{
    return
        nuInf_
      + (nu0_ - nuInf_)
       *pow(scalar(1) + sqr(k_*strainRate()), (n_ - 1.0)/2.0);
}


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

Foam::viscosityModels::BirdCarreau::BirdCarreau
(
    const word& name,
    const dictionary& viscosityProperties,
    const volVectorField& U,
    const surfaceScalarField& phi
)
:
    viscosityModel(name, viscosityProperties, U, phi),
    BirdCarreauCoeffs_(viscosityProperties.subDict(typeName + "Coeffs")),
    nu0_(BirdCarreauCoeffs_.lookup("nu0")),
    nuInf_(BirdCarreauCoeffs_.lookup("nuInf")),
    k_(BirdCarreauCoeffs_.lookup("k")),
    n_(BirdCarreauCoeffs_.lookup("n")),
    nu_
    (
        IOobject
        (
            "nu",
            U_.time().timeName(),
            U_.db(),
            IOobject::NO_READ,
            IOobject::AUTO_WRITE
        ),
        calcNu()
    )
{}


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

bool Foam::viscosityModels::BirdCarreau::read
(
    const dictionary& viscosityProperties
)
{
    viscosityModel::read(viscosityProperties);

    BirdCarreauCoeffs_ = viscosityProperties.subDict(typeName + "Coeffs");

    BirdCarreauCoeffs_.lookup("nu0") >> nu0_;
    BirdCarreauCoeffs_.lookup("nuInf") >> nuInf_;
    BirdCarreauCoeffs_.lookup("k") >> k_;
    BirdCarreauCoeffs_.lookup("n") >> n_;

    return true;
}


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