plastic.C

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    Copyright (C) 2020 OpenCFD Ltd.
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#include "plastic.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace mixtureViscosityModels
{
    defineTypeNameAndDebug(plastic, 0);
 
    addToRunTimeSelectionTable
    (
        mixtureViscosityModel,
        plastic,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::mixtureViscosityModels::plastic::plastic
(
    const word& name,
    const dictionary& viscosityProperties,
    const volVectorField& U,
    const surfaceScalarField& phi,
    const word modelName
)
:
    mixtureViscosityModel(name, viscosityProperties, U, phi),
    plasticCoeffs_(viscosityProperties.optionalSubDict(modelName + "Coeffs")),
    plasticViscosityCoeff_("coeff", dimDynamicViscosity, plasticCoeffs_),
    plasticViscosityExponent_("exponent", dimless, plasticCoeffs_),
    muMax_("muMax", dimDynamicViscosity, plasticCoeffs_),
    alpha_
    (
        U.mesh().lookupObject<volScalarField>
        (
            IOobject::groupName
            (
                viscosityProperties.getOrDefault<word>("alpha", "alpha"),
                viscosityProperties.dictName()
            )
        )
    )
{}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField>
Foam::mixtureViscosityModels::plastic::mu(const volScalarField& muc) const
{
    return min
    (
        muc
      + plasticViscosityCoeff_
       *(
            pow
            (
                scalar(10),
                plasticViscosityExponent_*alpha_
            ) - scalar(1)
        ),
        muMax_
    );
}
 
 
bool Foam::mixtureViscosityModels::plastic::read
(
    const dictionary& viscosityProperties
)
{
    mixtureViscosityModel::read(viscosityProperties);
 
    plasticCoeffs_ = viscosityProperties.optionalSubDict(typeName + "Coeffs");
 
    plasticCoeffs_.readEntry("k", plasticViscosityCoeff_);
    plasticCoeffs_.readEntry("n", plasticViscosityExponent_);
    plasticCoeffs_.readEntry("muMax", muMax_);
 
    return true;
}
 
 
// ************************************************************************* //