1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2011 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
11 OpenFOAM is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation, either version 3 of the License, or
14 (at your option) any later version.
16 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
24 \*---------------------------------------------------------------------------*/
26 #include "GidaspowErgunWenYu.H"
27 #include "addToRunTimeSelectionTable.H"
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
33 defineTypeNameAndDebug(GidaspowErgunWenYu, 0);
35 addToRunTimeSelectionTable
44 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
46 Foam::GidaspowErgunWenYu::GidaspowErgunWenYu
48 const dictionary& interfaceDict,
49 const volScalarField& alpha,
50 const phaseModel& phasea,
51 const phaseModel& phaseb
54 dragModel(interfaceDict, alpha, phasea, phaseb)
58 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
60 Foam::GidaspowErgunWenYu::~GidaspowErgunWenYu()
64 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
66 Foam::tmp<Foam::volScalarField> Foam::GidaspowErgunWenYu::K
68 const volScalarField& Ur
71 volScalarField beta = max(scalar(1) - alpha_, scalar(1.0e-6));
73 volScalarField bp = pow(beta, -2.65);
74 volScalarField Re = max(Ur*phasea_.d()/phaseb_.nu(), scalar(1.0e-3));
77 neg(Re - 1000)*(24.0*(1.0 + 0.15*pow(Re, 0.687))/Re)
78 + pos(Re - 1000)*0.44;
83 *(0.75*Cds*phaseb_.rho()*Ur*bp/phasea_.d())
86 150.0*alpha_*phaseb_.nu()*phaseb_.rho()/(sqr(beta*phasea_.d()))
87 + 1.75*phaseb_.rho()*Ur/(beta*phasea_.d())
92 // ************************************************************************* //