00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software: you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by 00013 the Free Software Foundation, either version 3 of the License, or 00014 (at your option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. 00023 00024 \*---------------------------------------------------------------------------*/ 00025 00026 #include "Ergun.H" 00027 #include <OpenFOAM/addToRunTimeSelectionTable.H> 00028 00029 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * // 00030 00031 namespace Foam 00032 { 00033 defineTypeNameAndDebug(Ergun, 0); 00034 00035 addToRunTimeSelectionTable 00036 ( 00037 dragModel, 00038 Ergun, 00039 dictionary 00040 ); 00041 } 00042 00043 00044 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * // 00045 00046 Foam::Ergun::Ergun 00047 ( 00048 const dictionary& interfaceDict, 00049 const volScalarField& alpha, 00050 const phaseModel& phasea, 00051 const phaseModel& phaseb 00052 ) 00053 : 00054 dragModel(interfaceDict, alpha, phasea, phaseb) 00055 {} 00056 00057 00058 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * // 00059 00060 Foam::Ergun::~Ergun() 00061 {} 00062 00063 00064 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * // 00065 00066 Foam::tmp<Foam::volScalarField> Foam::Ergun::K 00067 ( 00068 const volScalarField& Ur 00069 ) const 00070 { 00071 volScalarField beta = max(scalar(1) - alpha_, scalar(1.0e-6)); 00072 00073 return 00074 150.0*alpha_*phaseb_.nu()*phaseb_.rho() 00075 /sqr(beta*phasea_.d()) 00076 + 1.75*phaseb_.rho()*Ur/(beta*phasea_.d()); 00077 } 00078 00079 00080 // ************************ vim: set sw=4 sts=4 et: ************************ //
