applications/solvers/DNS/dnsFoam/dnsFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | foam-extend: Open Source CFD
   4    \\    /   O peration     | Version:     3.2
   5     \\  /    A nd           | Web:         http://www.foam-extend.org
   6      \\/     M anipulation  | For copyright notice see file Copyright
   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 Application
  25     dnsFoam
  26
  27 Description
  28     Direct numerical simulation solver for boxes of isotropic turbulence
  29
  30 \*---------------------------------------------------------------------------*/
  31
  32 #include "fvCFD.H"
  33 #include "Kmesh.H"
  34 #include "UOprocess.H"
  35 #include "fft.H"
  36 #include "calcEk.H"
  37 #include "graph.H"
  38
  39 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  40
  41 int main(int argc, char *argv[])
  42 {
  43     #include "setRootCase.H"
  44
  45     #include "createTime.H"
  46     #include "createMeshNoClear.H"
  47     #include "readTransportProperties.H"
  48     #include "createFields.H"
  49     #include "readTurbulenceProperties.H"
  50     #include "initContinuityErrs.H"
  51
  52     // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  53
  54     Info<< nl << "Starting time loop" << endl;
  55
  56     while (runTime.loop())
  57     {
  58         Info<< "Time = " << runTime.timeName() << nl << endl;
  59
  60         #include "readPISOControls.H"
  61
  62         force.internalField() = ReImSum
  63         (
  64             fft::reverseTransform
  65             (
  66                 K/(mag(K) + 1.0e-6) ^ forceGen.newField(), K.nn()
  67             )
  68         );
  69
  70         #include "globalProperties.H"
  71
  72         fvVectorMatrix UEqn
  73         (
  74             fvm::ddt(U)
  75           + fvm::div(phi, U)
  76           - fvm::laplacian(nu, U)
  77          ==
  78             force
  79         );
  80
  81         solve(UEqn == -fvc::grad(p));
  82
  83
  84         // --- PISO loop
  85
  86         for (int corr=1; corr<=1; corr++)
  87         {
  88             volScalarField rUA = 1.0/UEqn.A();
  89
  90             U = rUA*UEqn.H();
  91             phi = (fvc::interpolate(U) & mesh.Sf())
  92                 + fvc::ddtPhiCorr(rUA, U, phi);
  93
  94             fvScalarMatrix pEqn
  95             (
  96                 fvm::laplacian(rUA, p) == fvc::div(phi)
  97             );
  98
  99             pEqn.solve();
 100
 101             phi -= pEqn.flux();
 102
 103 #           include "continuityErrs.H"
 104
 105             U -= rUA*fvc::grad(p);
 106             U.correctBoundaryConditions();
 107         }
 108
 109         runTime.write();
 110
 111         if (runTime.outputTime())
 112         {
 113             calcEk(U, K).write(runTime.timePath()/"Ek", runTime.graphFormat());
 114         }
 115
 116         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 117             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 118             << nl << endl;
 119     }
 120
 121     Info<< "End\n" << endl;
 122
 123     return 0;
 124 }
 125
 126
 127 // ************************************************************************* //