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

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
   6      \\/     M anipulation  |
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
  11     OpenFOAM is free software: you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by
  13     the Free Software Foundation, either version 3 of the License, or
  14     (at your option) any later version.
  15
  16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
  17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19     for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 \*---------------------------------------------------------------------------*/
  25
  26 #include "CrossPowerLaw.H"
  27 #include "addToRunTimeSelectionTable.H"
  28 #include "surfaceFields.H"
  29
  30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  31
  32 namespace Foam
  33 {
  34 namespace viscosityModels
  35 {
  36     defineTypeNameAndDebug(CrossPowerLaw, 0);
  37
  38     addToRunTimeSelectionTable
  39     (
  40         viscosityModel,
  41         CrossPowerLaw,
  42         dictionary
  43     );
  44 }
  45 }
  46
  47
  48 // * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
  49
  50 Foam::tmp<Foam::volScalarField>
  51 Foam::viscosityModels::CrossPowerLaw::calcNu() const
  52 {
  53     return (nu0_ - nuInf_)/(scalar(1) + pow(m_*strainRate(), n_)) + nuInf_;
  54 }
  55
  56
  57 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  58
  59 Foam::viscosityModels::CrossPowerLaw::CrossPowerLaw
  60 (
  61     const word& name,
  62     const dictionary& viscosityProperties,
  63     const volVectorField& U,
  64     const surfaceScalarField& phi
  65 )
  66 :
  67     viscosityModel(name, viscosityProperties, U, phi),
  68     CrossPowerLawCoeffs_(viscosityProperties.subDict(typeName + "Coeffs")),
  69     nu0_(CrossPowerLawCoeffs_.lookup("nu0")),
  70     nuInf_(CrossPowerLawCoeffs_.lookup("nuInf")),
  71     m_(CrossPowerLawCoeffs_.lookup("m")),
  72     n_(CrossPowerLawCoeffs_.lookup("n")),
  73     nu_
  74     (
  75         IOobject
  76         (
  77             name,
  78             U_.time().timeName(),
  79             U_.db(),
  80             IOobject::NO_READ,
  81             IOobject::AUTO_WRITE
  82         ),
  83         calcNu()
  84     )
  85 {}
  86
  87
  88 // * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
  89
  90 bool Foam::viscosityModels::CrossPowerLaw::read
  91 (
  92     const dictionary& viscosityProperties
  93 )
  94 {
  95     viscosityModel::read(viscosityProperties);
  96
  97     CrossPowerLawCoeffs_ = viscosityProperties.subDict(typeName + "Coeffs");
  98
  99     CrossPowerLawCoeffs_.lookup("nu0") >> nu0_;
 100     CrossPowerLawCoeffs_.lookup("nuInf") >> nuInf_;
 101     CrossPowerLawCoeffs_.lookup("m") >> m_;
 102     CrossPowerLawCoeffs_.lookup("n") >> n_;
 103
 104     return true;
 105 }
 106
 107
 108 // ************************************************************************* //