Foam::tmp<Foam::volScalarField>
Foam::kineticTheoryModels::frictionalStressModels::Schaeffer::nu
(
    const volScalarField& alpha1,
    const dimensionedScalar& alphaMax,
    const volScalarField& pf,
    const volSymmTensorField& D
) const
{
    const scalar I2Dsmall = 1.0e-15;

    // Creating nu assuming it should be 0 on the boundary which may not be
    // true
    tmp<volScalarField> tnu
    (
        new volScalarField
        (
            IOobject
            (
                "Schaeffer:nu",
                alpha1.mesh().time().timeName(),
                alpha1.mesh(),
                IOobject::NO_READ,
                IOobject::NO_WRITE,
                false
            ),
            alpha1.mesh(),
            dimensionedScalar("nu", dimensionSet(0, 2, -1, 0, 0), 0.0)
        )
    );

    volScalarField& nuf = tnu();

    forAll (D, celli)
    {
        if (alpha1[celli] > alphaMax.value() - 5e-2)
        {
            nuf[celli] =
                0.5*pf[celli]*sin(phi_.value())
               /(
                    sqrt(1.0/6.0*(sqr(D[celli].xx() - D[celli].yy())
                  + sqr(D[celli].yy() - D[celli].zz())
                  + sqr(D[celli].zz() - D[celli].xx()))
                  + sqr(D[celli].xy()) + sqr(D[celli].xz())
                  + sqr(D[celli].yz())) + I2Dsmall
                );
        }
    }

    // Correct coupled BCs
    nuf.correctBoundaryConditions();

    return tnu;
}
예제 #2
0
Foam::tmp<Foam::volScalarField>
Foam::laminarModels::generalizedNewtonianViscosityModels::strainRateFunction::
nu
(
    const volScalarField& nu0,
    const volScalarField& strainRate
) const
{
    tmp<volScalarField> tnu
    (
        volScalarField::New
        (
            IOobject::groupName(type() + ":nu", nu0.group()),
            nu0.mesh(),
            dimensionedScalar(dimViscosity, 0)
        )
    );

    tnu.ref().primitiveFieldRef() = strainRateFunction_->value(strainRate);

    volScalarField::Boundary& nuBf = tnu.ref().boundaryFieldRef();
    const volScalarField::Boundary& sigmaBf = strainRate.boundaryField();

    forAll(nuBf, patchi)
    {
        nuBf[patchi] = strainRateFunction_->value(sigmaBf[patchi]);
    }