src/turbulenceModels/compressible/LES/GenSGSStress/GenSGSStress.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of foam-extend.
  10
  11     foam-extend 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 3 of the License, or (at your
  14     option) any later version.
  15
  16     foam-extend is distributed in the hope that it will be useful, but
  17     WITHOUT ANY WARRANTY; without even the implied warranty of
  18     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19     General Public License for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 \*---------------------------------------------------------------------------*/
  25
  26 #include "GenSGSStress.H"
  27
  28 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  29
  30 namespace Foam
  31 {
  32 namespace compressible
  33 {
  34 namespace LESModels
  35 {
  36
  37 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  38
  39 GenSGSStress::GenSGSStress
  40 (
  41     const volScalarField& rho,
  42     const volVectorField& U,
  43     const surfaceScalarField& phi,
  44     const basicThermo& thermoPhysicalModel
  45 )
  46 :
  47     LESModel
  48     (
  49         word("GenSGSStress"),
  50         rho,
  51         U,
  52         phi,
  53         thermoPhysicalModel
  54     ),
  55
  56     ce_
  57     (
  58         dimensioned<scalar>::lookupOrAddToDict
  59         (
  60             "ce",
  61             coeffDict_,
  62             1.048
  63         )
  64     ),
  65
  66     Prt_
  67     (
  68         dimensioned<scalar>::lookupOrAddToDict
  69         (
  70             "Prt",
  71             coeffDict_,
  72             1.0
  73         )
  74     ),
  75
  76     B_
  77     (
  78         IOobject
  79         (
  80             "B",
  81             runTime_.timeName(),
  82             U_.db(),
  83             IOobject::MUST_READ,
  84             IOobject::AUTO_WRITE
  85         ),
  86         mesh_
  87     ),
  88
  89     muSgs_
  90     (
  91         IOobject
  92         (
  93             "muSgs",
  94             runTime_.timeName(),
  95             U_.db(),
  96             IOobject::MUST_READ,
  97             IOobject::AUTO_WRITE
  98         ),
  99         mesh_
 100     ),
 101
 102     alphaSgs_
 103     (
 104         IOobject
 105         (
 106             "alphaSgs",
 107             runTime_.timeName(),
 108             U_.db(),
 109             IOobject::MUST_READ,
 110             IOobject::AUTO_WRITE
 111         ),
 112         mesh_
 113     )
 114 {}
 115
 116
 117 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 118
 119 tmp<volSymmTensorField> GenSGSStress::devRhoBeff() const
 120 {
 121     return tmp<volSymmTensorField>
 122     (
 123         new volSymmTensorField
 124         (
 125             IOobject
 126             (
 127                 "devRhoReff",
 128                 runTime_.timeName(),
 129                 U_.db(),
 130                 IOobject::NO_READ,
 131                 IOobject::NO_WRITE
 132             ),
 133             rho()*B_ - mu()*dev(twoSymm(fvc::grad(U())))
 134         )
 135     );
 136 }
 137
 138
 139 tmp<fvVectorMatrix> GenSGSStress::divDevRhoBeff(volVectorField& U) const
 140 {
 141     return
 142     (
 143         fvc::div(rho()*B_ + 0.05*muSgs_*fvc::grad(U))
 144       + fvc::laplacian(0.95*muSgs_, U, "laplacian(muEff,U)")
 145       - fvm::laplacian(muEff(), U)
 146       - fvc::div(mu()*dev2(fvc::grad(U)().T()))
 147     );
 148 }
 149
 150
 151 void GenSGSStress::correct(const tmp<volTensorField>& gradU)
 152 {
 153     LESModel::correct(gradU);
 154 }
 155
 156
 157 bool GenSGSStress::read()
 158 {
 159     if (LESModel::read())
 160     {
 161         ce_.readIfPresent(coeffDict());
 162
 163         return true;
 164     }
 165     else
 166     {
 167         return false;
 168     }
 169 }
 170
 171
 172 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 173
 174 } // End namespace LESModels
 175 } // End namespace compressible
 176 } // End namespace Foam
 177
 178 // ************************************************************************* //