Ergun.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
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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\*---------------------------------------------------------------------------*/
 
#include "Ergun.H"
#include "phasePair.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(Ergun, 0);
    addToRunTimeSelectionTable(dragModel, Ergun, dictionary);
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::dragModels::Ergun::Ergun
(
    const dictionary& dict,
    const phasePair& pair,
    const bool registerObject
)
:
    dragModel(dict, pair, registerObject)
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::dragModels::Ergun::~Ergun()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> Foam::dragModels::Ergun::CdRe() const
{
    return
        (4/3)
       *(
            150
           *max
            (
                scalar(1) - pair_.continuous(),
                pair_.continuous().residualAlpha()
            )/max(pair_.continuous(), pair_.continuous().residualAlpha())
          + 1.75
           *pair_.Re()
        );
}
 
 
// ************************************************************************* //