GidaspowSchillerNaumann.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
     \\/     M anipulation  |
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License
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#include "GidaspowSchillerNaumann.H"
#include "phasePair.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(GidaspowSchillerNaumann, 0);
    addToRunTimeSelectionTable(dragModel, GidaspowSchillerNaumann, dictionary);
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::dragModels::GidaspowSchillerNaumann::GidaspowSchillerNaumann
(
    const dictionary& dict,
    const phasePair& pair,
    const bool registerObject
)
:
    dragModel(dict, pair, registerObject),
    residualRe_("residualRe", dimless, dict)
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::dragModels::GidaspowSchillerNaumann::~GidaspowSchillerNaumann()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField>
Foam::dragModels::GidaspowSchillerNaumann::CdRe() const
{
    volScalarField alpha2
    (
        max(scalar(1) - pair_.dispersed(), pair_.continuous().residualAlpha())
    );
 
    volScalarField Re(alpha2*pair_.Re());
 
    volScalarField CdsRe
    (
        neg(Re - 1000)*24.0*(1.0 + 0.15*pow(Re, 0.687))/alpha2
      + pos(Re - 1000)*0.44*max(Re, residualRe_)
    );
 
    return
        CdsRe
       *pow(alpha2, -2.65)
       *max(pair_.continuous(), pair_.continuous().residualAlpha());
}
 
 
// ************************************************************************* //