strainRateFunction.C

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    Copyright (C) 2017-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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#include "strainRateFunction.H"
#include "addToRunTimeSelectionTable.H"
#include "surfaceFields.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace viscosityModels
{
    defineTypeNameAndDebug(strainRateFunction, 0);
 
    addToRunTimeSelectionTable
    (
        viscosityModel,
        strainRateFunction,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::viscosityModels::strainRateFunction::strainRateFunction
(
    const word& name,
    const dictionary& viscosityProperties,
    const volVectorField& U,
    const surfaceScalarField& phi
)
:
    viscosityModel(name, viscosityProperties, U, phi),
    strainRateFunctionCoeffs_
    (
        viscosityProperties.optionalSubDict(typeName + "Coeffs")
    ),
    strainRateFunction_
    (
        Function1<scalar>::New
        (
            "function",
            strainRateFunctionCoeffs_,
            &U_.db()
        )
    ),
    nu_
    (
        IOobject
        (
            name,
            U_.time().timeName(),
            U_.db(),
            IOobject::NO_READ,
            IOobject::AUTO_WRITE
        ),
        U_.mesh(),
        dimensionedScalar(dimViscosity, Zero)
    )
{
    correct();
}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField>
Foam::viscosityModels::strainRateFunction::nu() const
{
    return nu_;
}
 
 
Foam::tmp<Foam::scalarField>
Foam::viscosityModels::strainRateFunction::nu(const label patchi) const
{
    return nu_.boundaryField()[patchi];
}
 
 
void Foam::viscosityModels::strainRateFunction::correct()
{
    tmp<volScalarField> tsigma = strainRate();
    const volScalarField& sigma = tsigma();
 
    nu_.primitiveFieldRef() = strainRateFunction_->value(sigma());
 
    volScalarField::Boundary& nuBf = nu_.boundaryFieldRef();
    const volScalarField::Boundary& sigmaBf = sigma.boundaryField();
 
    forAll(nuBf, patchi)
    {
        nuBf[patchi] = strainRateFunction_->value(sigmaBf[patchi]);
    }
}
 
 
bool Foam::viscosityModels::strainRateFunction::read
(
    const dictionary& viscosityProperties
)
{
    viscosityModel::read(viscosityProperties);
 
    strainRateFunctionCoeffs_ = viscosityProperties.optionalSubDict
    (
        typeName + "Coeffs"
    );
 
    strainRateFunction_.clear();
    strainRateFunction_ = Function1<scalar>::New
    (
        "function",
        strainRateFunctionCoeffs_,
        &U_.db()
    );
 
    return true;
}
 
 
// ************************************************************************* //