LuoSvendsen.C

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    Copyright (C) 2019 OpenFOAM Foundation
    Copyright (C) 2020-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    for more details.
 
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#include "LuoSvendsen.H"
#include "addToRunTimeSelectionTable.H"
#include "phaseCompressibleTurbulenceModel.H"
#include "tableBounds.H"
#include "MathFunctions.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace diameterModels
{
namespace binaryBreakupModels
{
    defineTypeNameAndDebug(LuoSvendsen, 0);
    addToRunTimeSelectionTable
    (
        binaryBreakupModel,
        LuoSvendsen,
        dictionary
    );
}
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::diameterModels::binaryBreakupModels::LuoSvendsen::LuoSvendsen
(
    const populationBalanceModel& popBal,
    const dictionary& dict
)
:
    binaryBreakupModel(popBal, dict),
    gammaUpperReg2by11_(),
    gammaUpperReg5by11_(),
    gammaUpperReg8by11_(),
    C4_(dimensionedScalar::getOrDefault("C4", dict, dimless, 0.923)),
    beta_(dimensionedScalar::getOrDefault("beta", dict, dimless, 2.05)),
    minEddyRatio_
    (
        dimensionedScalar::getOrDefault("minEddyRatio", dict, dimless, 11.4)
    ),
    kolmogorovLengthScale_
    (
        IOobject
        (
            "kolmogorovLengthScale",
            popBal_.time().timeName(),
            popBal_.mesh()
        ),
        popBal_.mesh(),
        dimensionedScalar
        (
            "kolmogorovLengthScale",
            dimLength,
            Zero
        )
    )
{
    List<Tuple2<scalar, scalar>> gammaUpperReg2by11Table;
    List<Tuple2<scalar, scalar>> gammaUpperReg5by11Table;
    List<Tuple2<scalar, scalar>> gammaUpperReg8by11Table;
 
    gammaUpperReg2by11Table.append(Tuple2<scalar, scalar>(0.0, 1.0));
    gammaUpperReg5by11Table.append(Tuple2<scalar, scalar>(0.0, 1.0));
    gammaUpperReg8by11Table.append(Tuple2<scalar, scalar>(0.0, 1.0));
 
    for (scalar z = 1e-2; z <= 10.0; z = z + 1e-2)
    {
        Tuple2<scalar, scalar> gamma2by11
            (
                z,
                Math::incGammaRatio_Q(2.0/11.0, z)
            );
 
        Tuple2<scalar, scalar> gamma5by11
            (
                z,
                Math::incGammaRatio_Q(5.0/11.0, z)
            );
 
        Tuple2<scalar, scalar> gamma8by11
            (
                z,
                Math::incGammaRatio_Q(8.0/11.0, z)
            );
 
        gammaUpperReg2by11Table.append(gamma2by11);
        gammaUpperReg5by11Table.append(gamma5by11);
        gammaUpperReg8by11Table.append(gamma8by11);
    }
 
    gammaUpperReg2by11_.reset
    (
        new interpolationTable<scalar>
        (
            gammaUpperReg2by11Table,
            bounds::repeatableBounding::CLAMP,
            "gamma2by11"
        )
    );
 
    gammaUpperReg5by11_.reset
    (
        new interpolationTable<scalar>
        (
            gammaUpperReg5by11Table,
            bounds::repeatableBounding::CLAMP,
            "gamma5by11"
        )
    );
 
    gammaUpperReg8by11_.reset
    (
        new interpolationTable<scalar>
        (
            gammaUpperReg8by11Table,
            bounds::repeatableBounding::CLAMP,
            "gamma8by11"
        )
    );
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::diameterModels::binaryBreakupModels::LuoSvendsen::correct()
{
    kolmogorovLengthScale_ =
        pow025
        (
            pow3
            (
                popBal_.continuousPhase().nu()
            )
           /popBal_.continuousTurbulence().epsilon()
        );
}
 
 
void
Foam::diameterModels::binaryBreakupModels::LuoSvendsen::addToBinaryBreakupRate
(
    volScalarField& binaryBreakupRate,
    const label i,
    const label j
)
{
    const phaseModel& continuousPhase = popBal_.continuousPhase();
    const sizeGroup& fi = popBal_.sizeGroups()[i];
    const sizeGroup& fj = popBal_.sizeGroups()[j];
 
    const dimensionedScalar cf
    (
        pow(fi.x()/fj.x(), 2.0/3.0) + pow((1 - fi.x()/fj.x()), 2.0/3.0) - 1
    );
 
    const volScalarField b
    (
        12.0*cf*popBal_.sigmaWithContinuousPhase(fi.phase())
       /(
            beta_*continuousPhase.rho()*pow(fj.d(), 5.0/3.0)
           *pow(popBal_.continuousTurbulence().epsilon(), 2.0/3.0)
        )
    );
 
    const volScalarField xiMin(minEddyRatio_*kolmogorovLengthScale_/fj.d());
 
    const volScalarField tMin(b/pow(xiMin, 11.0/3.0));
 
    volScalarField integral(3.0/(11.0*pow(b, 8.0/11.0)));
 
    forAll(integral, celli)
    {
        integral[celli] *=
            2.0*pow(b[celli], 3.0/11.0)*tgamma(5.0/11.0)
           *(
                gammaUpperReg5by11_()(b[celli])
              - gammaUpperReg5by11_()(tMin[celli])
            );
    }
 
    binaryBreakupRate +=
        C4_*(1 - popBal_.alphas())/fj.x()
       *cbrt
        (
            popBal_.continuousTurbulence().epsilon()
           /sqr(fj.d())
        )
       *integral;
}
 
 
// ************************************************************************* //