00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2011 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 "SchillerNaumann.H" 00027 #include <OpenFOAM/addToRunTimeSelectionTable.H> 00028 00029 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * // 00030 00031 namespace Foam 00032 { 00033 defineTypeNameAndDebug(SchillerNaumann, 0); 00034 00035 addToRunTimeSelectionTable 00036 ( 00037 dragModel, 00038 SchillerNaumann, 00039 dictionary 00040 ); 00041 } 00042 00043 00044 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * // 00045 00046 Foam::SchillerNaumann::SchillerNaumann 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::SchillerNaumann::~SchillerNaumann() 00061 {} 00062 00063 00064 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * // 00065 00066 Foam::tmp<Foam::volScalarField> Foam::SchillerNaumann::K 00067 ( 00068 const volScalarField& Ur 00069 ) const 00070 { 00071 volScalarField Re = max(Ur*phasea_.d()/phaseb_.nu(), scalar(1.0e-3)); 00072 00073 volScalarField Cds = 00074 neg(Re - 1000)*(24.0*(1.0 + 0.15*pow(Re, 0.687))/Re) 00075 + pos(Re - 1000)*0.44; 00076 00077 return 0.75*Cds*phaseb_.rho()*Ur/phasea_.d(); 00078 } 00079 00080 00081 // ************************ vim: set sw=4 sts=4 et: ************************ //
