FreeFOAM The Cross-Platform CFD Toolkit
BirdCarreau.C
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25 
26 #include "BirdCarreau.H"
29 
30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
31 
32 namespace Foam
33 {
34 namespace viscosityModels
35 {
38  (
42  );
43 }
44 }
45 
46 
47 // * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * * //
48 
50 Foam::viscosityModels::BirdCarreau::calcNu() const
51 {
52  return
53  nuInf_
54  + (nu0_ - nuInf_)
55  *pow(scalar(1) + sqr(k_*strainRate()), (n_ - 1.0)/2.0);
56 }
57 
58 
59 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
60 
62 (
63  const word& name,
64  const dictionary& viscosityProperties,
65  const volVectorField& U,
66  const surfaceScalarField& phi
67 )
68 :
69  viscosityModel(name, viscosityProperties, U, phi),
70  BirdCarreauCoeffs_(viscosityProperties.subDict(typeName + "Coeffs")),
71  nu0_(BirdCarreauCoeffs_.lookup("nu0")),
72  nuInf_(BirdCarreauCoeffs_.lookup("nuInf")),
73  k_(BirdCarreauCoeffs_.lookup("k")),
74  n_(BirdCarreauCoeffs_.lookup("n")),
75  nu_
76  (
77  IOobject
78  (
79  "nu",
80  U_.time().timeName(),
81  U_.db(),
84  ),
85  calcNu()
86  )
87 {}
88 
89 
90 // * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
91 
93 (
94  const dictionary& viscosityProperties
95 )
96 {
97  viscosityModel::read(viscosityProperties);
98 
99  BirdCarreauCoeffs_ = viscosityProperties.subDict(typeName + "Coeffs");
100 
101  BirdCarreauCoeffs_.lookup("nu0") >> nu0_;
102  BirdCarreauCoeffs_.lookup("nuInf") >> nuInf_;
103  BirdCarreauCoeffs_.lookup("k") >> k_;
104  BirdCarreauCoeffs_.lookup("n") >> n_;
105 
106  return true;
107 }
108 
109 
110 // ************************ vim: set sw=4 sts=4 et: ************************ //