applications/solvers/DNS/dnsFoam/dnsFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright held by original author
   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 Application
  26     dnsFoam
  27
  28 Description
  29     Direct numerical simulation solver for boxes of isotropic turbulence
  30
  31 \*---------------------------------------------------------------------------*/
  32
  33 #include "fvCFD.H"
  34 #include "Kmesh.H"
  35 #include "UOprocess.H"
  36 #include "fft.H"
  37 #include "calcEk.H"
  38 #include "graph.H"
  39
  40 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  41
  42 int main(int argc, char *argv[])
  43 {
  44     #include "setRootCase.H"
  45
  46     #include "createTime.H"
  47     #include "createMeshNoClear.H"
  48     #include "readTransportProperties.H"
  49     #include "createFields.H"
  50     #include "readTurbulenceProperties.H"
  51     #include "initContinuityErrs.H"
  52
  53     // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  54
  55     Info<< nl << "Starting time loop" << endl;
  56
  57     while (runTime.loop())
  58     {
  59         Info<< "Time = " << runTime.timeName() << nl << endl;
  60
  61         #include "readPISOControls.H"
  62
  63         force.internalField() = ReImSum
  64         (
  65             fft::reverseTransform
  66             (
  67                 K/(mag(K) + 1.0e-6) ^ forceGen.newField(), K.nn()
  68             )
  69         );
  70
  71         #include "globalProperties.H"
  72
  73         fvVectorMatrix UEqn
  74         (
  75             fvm::ddt(U)
  76           + fvm::div(phi, U)
  77           - fvm::laplacian(nu, U)
  78          ==
  79             force
  80         );
  81
  82         solve(UEqn == -fvc::grad(p));
  83
  84
  85         // --- PISO loop
  86
  87         for (int corr=1; corr<=1; corr++)
  88         {
  89             volScalarField rUA = 1.0/UEqn.A();
  90
  91             U = rUA*UEqn.H();
  92             phi = (fvc::interpolate(U) & mesh.Sf())
  93                 + fvc::ddtPhiCorr(rUA, U, phi);
  94
  95             fvScalarMatrix pEqn
  96             (
  97                 fvm::laplacian(rUA, p) == fvc::div(phi)
  98             );
  99
 100             pEqn.solve();
 101
 102             phi -= pEqn.flux();
 103
 104 #           include "continuityErrs.H"
 105
 106             U -= rUA*fvc::grad(p);
 107             U.correctBoundaryConditions();
 108         }
 109
 110         runTime.write();
 111
 112         if (runTime.outputTime())
 113         {
 114             calcEk(U, K).write(runTime.timePath()/"Ek", runTime.graphFormat());
 115         }
 116
 117         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 118             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 119             << nl << endl;
 120     }
 121
 122     Info<< "End\n" << endl;
 123
 124     return 0;
 125 }
 126
 127
 128 // ************************************************************************* //