Beetstra.C

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    Copyright (C) 2016-2018 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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#include "Beetstra.H"
#include "phasePair.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(Beetstra, 0);
    addToRunTimeSelectionTable(dragModel, Beetstra, dictionary);
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::dragModels::Beetstra::Beetstra
(
    const dictionary& dict,
    const phasePair& pair,
    const bool registerObject
)
:
    dragModel(dict, pair, registerObject),
    residualRe_("residualRe", dimless, dict)
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::dragModels::Beetstra::~Beetstra()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> Foam::dragModels::Beetstra::CdRe() const
{
    volScalarField alpha1
    (
        max(pair_.dispersed(), pair_.continuous().residualAlpha())
    );
 
    volScalarField alpha2
    (
        max(scalar(1) - pair_.dispersed(), pair_.continuous().residualAlpha())
    );
 
    volScalarField Res(alpha2*pair_.Re());
 
    volScalarField ResLim
    (
        "ReLim",
        max(Res, residualRe_)
    );
 
    volScalarField F0
    (
        "F0",
        10*alpha1/sqr(alpha2) + sqr(alpha2)*(1 + 1.5*sqrt(alpha1))
    );
 
    volScalarField F1
    (
        "F1",
        0.413*Res/(24*sqr(alpha2))*(1.0/alpha2
        + 3*alpha1*alpha2 + 8.4*pow(ResLim, -0.343))
        /(1 + pow(10.0, 3*alpha1)*pow(ResLim, -(1 + 4*alpha1)/2.0))
    );
 
    return 24*alpha2*(F0 + F1);
}
 
 
// ************************************************************************* //