applications/solvers/combustion/PDRFoam/PDRModels/XiEqModels/basicXiSubXiEq/basicXiSubXiEq.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   5     \\  /    A nd           | Copyright (C) 1991-2009 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 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
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  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 "basicXiSubXiEq.H"
  28 #include "addToRunTimeSelectionTable.H"
  29
  30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  31
  32 namespace Foam
  33 {
  34 namespace XiEqModels
  35 {
  36     defineTypeNameAndDebug(basicSubGrid, 0);
  37     addToRunTimeSelectionTable(XiEqModel, basicSubGrid, dictionary);
  38 };
  39 };
  40
  41
  42 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  43
  44 Foam::XiEqModels::basicSubGrid::basicSubGrid
  45 (
  46     const dictionary& XiEqProperties,
  47     const hhuCombustionThermo& thermo,
  48     const compressible::RASModel& turbulence,
  49     const volScalarField& Su
  50 )
  51 :
  52     XiEqModel(XiEqProperties, thermo, turbulence, Su),
  53
  54     N_
  55     (
  56         IOobject
  57         (
  58             "N",
  59             Su.mesh().time().findInstance(polyMesh::meshSubDir, "N"),
  60             polyMesh::meshSubDir,
  61             Su.mesh(),
  62             IOobject::MUST_READ,
  63             IOobject::NO_WRITE
  64         ),
  65         Su.mesh()
  66     ),
  67
  68     ns_
  69     (
  70         IOobject
  71         (
  72             "ns",
  73             Su.mesh().time().findInstance(polyMesh::meshSubDir, "ns"),
  74             polyMesh::meshSubDir,
  75             Su.mesh(),
  76             IOobject::MUST_READ,
  77             IOobject::NO_WRITE
  78         ),
  79         Su.mesh()
  80     ),
  81
  82     B_
  83     (
  84         IOobject
  85         (
  86             "B",
  87             Su.mesh().time().findInstance(polyMesh::meshSubDir, "B"),
  88             polyMesh::meshSubDir,
  89             Su.mesh(),
  90             IOobject::MUST_READ,
  91             IOobject::NO_WRITE
  92         ),
  93         Su.mesh()
  94     ),
  95
  96     Lobs_
  97     (
  98         IOobject
  99         (
 100             "Lobs",
 101             Su.mesh().time().findInstance(polyMesh::meshSubDir, "Lobs"),
 102             polyMesh::meshSubDir,
 103             Su.mesh(),
 104             IOobject::MUST_READ,
 105             IOobject::NO_WRITE
 106         ),
 107         Su.mesh()
 108     ),
 109
 110     XiEqModel_(XiEqModel::New(XiEqModelCoeffs_, thermo, turbulence, Su))
 111 {}
 112
 113
 114 // * * * * * * * * * * * * * * * * Destructors * * * * * * * * * * * * * * * //
 115
 116 Foam::XiEqModels::basicSubGrid::~basicSubGrid()
 117 {}
 118
 119
 120 // * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 121
 122 Foam::tmp<Foam::volScalarField> Foam::XiEqModels::basicSubGrid::XiEq() const
 123 {
 124     const objectRegistry& db = Su_.db();
 125     const volVectorField& U = db.lookupObject<volVectorField>("U");
 126
 127     volScalarField magU = mag(U);
 128     volVectorField Uhat =
 129     U/(mag(U) + dimensionedScalar("Usmall", U.dimensions(), 1e-4));
 130
 131     volScalarField n = max(N_ - (Uhat & ns_ & Uhat), scalar(1e-4));
 132
 133     volScalarField b = (Uhat & B_ & Uhat)/n;
 134
 135     volScalarField up = sqrt((2.0/3.0)*turbulence_.k());
 136
 137     volScalarField XiSubEq =
 138         scalar(1)
 139       + max(2.2*sqrt(b), min(0.34*magU/up, scalar(1.6)))
 140        *min(0.25*n, scalar(1));
 141
 142     return XiSubEq*XiEqModel_->XiEq();
 143 }
 144
 145
 146 bool Foam::XiEqModels::basicSubGrid::read(const dictionary& XiEqProperties)
 147 {
 148     XiEqModel::read(XiEqProperties);
 149
 150     return XiEqModel_->read(XiEqModelCoeffs_);
 151 }
 152
 153
 154 // ************************************************************************* //