applications/solvers/multiphase/twoPhaseEulerFoam/kineticTheoryModels/viscosityModel/HrenyaSinclair/HrenyaSinclairViscosity.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
   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 the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     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, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 \*---------------------------------------------------------------------------*/
  26
  27 #include "HrenyaSinclairViscosity.H"
  28 #include "mathematicalConstants.H"
  29 #include "addToRunTimeSelectionTable.H"
  30
  31 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  32
  33 namespace Foam
  34 {
  35 namespace kineticTheoryModels
  36 {
  37     defineTypeNameAndDebug(HrenyaSinclairViscosity, 0);
  38
  39     addToRunTimeSelectionTable
  40     (
  41         viscosityModel,
  42         HrenyaSinclairViscosity,
  43         dictionary
  44     );
  45 }
  46 }
  47
  48 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  49
  50 Foam::kineticTheoryModels::HrenyaSinclairViscosity::HrenyaSinclairViscosity
  51 (
  52     const dictionary& dict
  53 )
  54 :
  55     viscosityModel(dict),
  56     coeffsDict_(dict.subDict(typeName + "Coeffs")),
  57     L_(coeffsDict_.lookup("L"))
  58 {}
  59
  60
  61 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
  62
  63 Foam::kineticTheoryModels::HrenyaSinclairViscosity::~HrenyaSinclairViscosity()
  64 {}
  65
  66
  67 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
  68
  69 Foam::tmp<Foam::volScalarField>
  70 Foam::kineticTheoryModels::HrenyaSinclairViscosity::mua
  71 (
  72     const volScalarField& alpha,
  73     const volScalarField& Theta,
  74     const volScalarField& g0,
  75     const dimensionedScalar& rhoa,
  76     const dimensionedScalar& da,
  77     const dimensionedScalar& e
  78 ) const
  79 {
  80     const scalar sqrtPi = sqrt(mathematicalConstant::pi);
  81
  82     volScalarField lamda =
  83         scalar(1) + da/(6.0*sqrt(2.0)*(alpha + scalar(1.0e-5)))/L_;
  84
  85     return rhoa*da*sqrt(Theta)*
  86     (
  87         (4.0/5.0)*sqr(alpha)*g0*(1.0 + e)/sqrtPi
  88       + (1.0/15.0)*sqrtPi*g0*(1.0 + e)*(3.0*e - 1)*sqr(alpha)/(3.0-e)
  89       + (1.0/6.0)*sqrtPi*alpha*(0.5*lamda + 0.25*(3.0*e - 1.0))
  90        /(0.5*(3.0 - e)*lamda)
  91       + (10/96.0)*sqrtPi/((1.0 + e)*0.5*(3.0 - e)*g0*lamda)
  92     );
  93 }
  94
  95
  96 // ************************************************************************* //