GidaspowSchillerNaumann.C
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1 /*---------------------------------------------------------------------------*\
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3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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5  \\ / A nd | Copyright (C) 2011-2014 OpenFOAM Foundation
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25 
27 #include "phasePair.H"
29 
30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
31 
32 namespace Foam
33 {
34 namespace dragModels
35 {
36  defineTypeNameAndDebug(GidaspowSchillerNaumann, 0);
37  addToRunTimeSelectionTable(dragModel, GidaspowSchillerNaumann, dictionary);
38 }
39 }
40 
41 
42 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
43 
45 (
46  const dictionary& dict,
47  const phasePair& pair,
48  const bool registerObject
49 )
50 :
51  dragModel(dict, pair, registerObject),
52  residualRe_("residualRe", dimless, dict.lookup("residualRe"))
53 {}
54 
55 
56 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
57 
59 {}
60 
61 
62 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
63 
64 Foam::tmp<Foam::volScalarField>
66 {
67  volScalarField alpha2(max(scalar(1) - pair_.dispersed(), residualAlpha_));
68  volScalarField Re(alpha2*pair_.Re());
69  volScalarField CdsRe
70  (
71  neg(Re - 1000)*24.0*(1.0 + 0.15*pow(Re, 0.687))/alpha2
72  + pos(Re - 1000)*0.44*max(Re, residualRe_)
73  );
74 
75  return
76  CdsRe
77  *pow(alpha2, -2.65)
78  *max(pair_.continuous(), residualAlpha_);
79 }
80 
81 
82 // ************************************************************************* //