src/transportModels/incompressible/viscosityModels/CrossPowerLaw/CrossPowerLaw.C

   1 /*---------------------------------------------------------------------------*\
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   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
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  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     option) any later version.
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  19     for more details.
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  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 \*---------------------------------------------------------------------------*/
  26
  27 #include "CrossPowerLaw.H"
  28 #include "addToRunTimeSelectionTable.H"
  29 #include "surfaceFields.H"
  30
  31 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  32
  33 namespace Foam
  34 {
  35 namespace viscosityModels
  36 {
  37     defineTypeNameAndDebug(CrossPowerLaw, 0);
  38
  39     addToRunTimeSelectionTable
  40     (
  41         viscosityModel,
  42         CrossPowerLaw,
  43         dictionary
  44     );
  45 }
  46 }
  47
  48
  49 // * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
  50
  51 Foam::tmp<Foam::volScalarField>
  52 Foam::viscosityModels::CrossPowerLaw::calcNu() const
  53 {
  54     return (nu0_ - nuInf_)/(scalar(1) + pow(m_*strainRate(), n_)) + nuInf_;
  55 }
  56
  57
  58 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  59
  60 Foam::viscosityModels::CrossPowerLaw::CrossPowerLaw
  61 (
  62     const word& name,
  63     const dictionary& viscosityProperties,
  64     const volVectorField& U,
  65     const surfaceScalarField& phi
  66 )
  67 :
  68     viscosityModel(name, viscosityProperties, U, phi),
  69     CrossPowerLawCoeffs_(viscosityProperties.subDict(typeName + "Coeffs")),
  70     nu0_(CrossPowerLawCoeffs_.lookup("nu0")),
  71     nuInf_(CrossPowerLawCoeffs_.lookup("nuInf")),
  72     m_(CrossPowerLawCoeffs_.lookup("m")),
  73     n_(CrossPowerLawCoeffs_.lookup("n")),
  74     nu_
  75     (
  76         IOobject
  77         (
  78             name,
  79             U_.time().timeName(),
  80             U_.db(),
  81             IOobject::NO_READ,
  82             IOobject::AUTO_WRITE
  83         ),
  84         calcNu()
  85     )
  86 {}
  87
  88
  89 // * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
  90
  91 bool Foam::viscosityModels::CrossPowerLaw::read
  92 (
  93     const dictionary& viscosityProperties
  94 )
  95 {
  96     viscosityModel::read(viscosityProperties);
  97
  98     CrossPowerLawCoeffs_ = viscosityProperties.subDict(typeName + "Coeffs");
  99
 100     CrossPowerLawCoeffs_.lookup("nu0") >> nu0_;
 101     CrossPowerLawCoeffs_.lookup("nuInf") >> nuInf_;
 102     CrossPowerLawCoeffs_.lookup("m") >> m_;
 103     CrossPowerLawCoeffs_.lookup("n") >> n_;
 104
 105     return true;
 106 }
 107
 108
 109 // ************************************************************************* //