applications/solvers/multiphase/twoPhaseEulerFoam/kineticTheoryModels/frictionalStressModel/JohnsonJackson/JohnsonJacksonFrictionalStress.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
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   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 "JohnsonJacksonFrictionalStress.H"
  27 #include "addToRunTimeSelectionTable.H"
  28
  29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  30
  31 namespace Foam
  32 {
  33     defineTypeNameAndDebug(JohnsonJacksonFrictionalStress, 0);
  34
  35     addToRunTimeSelectionTable
  36     (
  37         frictionalStressModel,
  38         JohnsonJacksonFrictionalStress,
  39         dictionary
  40     );
  41 }
  42
  43
  44 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  45
  46 Foam::JohnsonJacksonFrictionalStress::JohnsonJacksonFrictionalStress
  47 (
  48     const dictionary& dict
  49 )
  50 :
  51     frictionalStressModel(dict)
  52 {}
  53
  54
  55 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
  56
  57 Foam::JohnsonJacksonFrictionalStress::~JohnsonJacksonFrictionalStress()
  58 {}
  59
  60
  61 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
  62
  63 Foam::tmp<Foam::volScalarField> Foam::JohnsonJacksonFrictionalStress::
  64 frictionalPressure
  65 (
  66     const volScalarField& alpha,
  67     const dimensionedScalar& alphaMinFriction,
  68     const dimensionedScalar& alphaMax,
  69     const dimensionedScalar& Fr,
  70     const dimensionedScalar& eta,
  71     const dimensionedScalar& p
  72 ) const
  73 {
  74
  75     return
  76         Fr*pow(max(alpha - alphaMinFriction, scalar(0)), eta)
  77        /pow(max(alphaMax - alpha, scalar(5.0e-2)), p);
  78 }
  79
  80
  81 Foam::tmp<Foam::volScalarField> Foam::JohnsonJacksonFrictionalStress::
  82 frictionalPressurePrime
  83 (
  84     const volScalarField& alpha,
  85     const dimensionedScalar& alphaMinFriction,
  86     const dimensionedScalar& alphaMax,
  87     const dimensionedScalar& Fr,
  88     const dimensionedScalar& eta,
  89     const dimensionedScalar& p
  90 ) const
  91 {
  92     return Fr*
  93     (
  94         eta*pow(max(alpha - alphaMinFriction, scalar(0)), eta - 1.0)
  95        *(alphaMax-alpha) + p*pow(max(alpha - alphaMinFriction, scalar(0)), eta)
  96     )/pow(max(alphaMax - alpha, scalar(5.0e-2)), p + 1.0);
  97 }
  98
  99
 100 Foam::tmp<Foam::volScalarField> Foam::JohnsonJacksonFrictionalStress::muf
 101 (
 102     const volScalarField& alpha,
 103     const dimensionedScalar& alphaMax,
 104     const volScalarField& pf,
 105     const volSymmTensorField& D,
 106     const dimensionedScalar& phi
 107 ) const
 108 {
 109     return dimensionedScalar("0.5", dimTime, 0.5)*pf*sin(phi);
 110 }
 111
 112
 113 // ************************************************************************* //