WenYu.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  |
-------------------------------------------------------------------------------
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
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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\*---------------------------------------------------------------------------*/
 
#include "WenYu.H"
#include "phasePair.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(WenYu, 0);
    addToRunTimeSelectionTable(dragModel, WenYu, dictionary);
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::dragModels::WenYu::WenYu
(
    const dictionary& dict,
    const phasePair& pair,
    const bool registerObject
)
:
    dragModel(dict, pair, registerObject),
    residualRe_("residualRe", dimless, dict)
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::dragModels::WenYu::~WenYu()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> Foam::dragModels::WenYu::CdRe() const
{
    volScalarField alpha2
    (
        max(scalar(1) - pair_.dispersed(), pair_.continuous().residualAlpha())
    );
 
    volScalarField Res(alpha2*pair_.Re());
    volScalarField CdsRes
    (
        neg(Res - 1000)*24.0*(1.0 + 0.15*pow(Res, 0.687))
      + pos(Res - 1000)*0.44*max(Res, residualRe_)
    );
 
    return
        CdsRes
       *pow(alpha2, -3.65)
       *max(pair_.continuous(), pair_.continuous().residualAlpha());
}
 
 
// ************************************************************************* //