applications/solvers/incompressible/channelFoam/channelFoam.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     channelFoam
  26
  27 Description
  28     Incompressible LES solver for flow in a channel.
  29
  30 \*---------------------------------------------------------------------------*/
  31
  32 #include "fvCFD.H"
  33 #include "singlePhaseTransportModel.H"
  34 #include "LESModel.H"
  35 #include "IFstream.H"
  36 #include "OFstream.H"
  37 #include "Random.H"
  38
  39 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  40
  41 int main(int argc, char *argv[])
  42 {
  43     #include "setRootCase.H"
  44     #include "createTime.H"
  45     #include "createMesh.H"
  46     #include "readTransportProperties.H"
  47     #include "createFields.H"
  48     #include "initContinuityErrs.H"
  49     #include "createGradP.H"
  50
  51     Info<< "\nStarting time loop\n" << endl;
  52
  53     while (runTime.loop())
  54     {
  55         Info<< "Time = " << runTime.timeName() << nl << endl;
  56
  57         #include "readPISOControls.H"
  58
  59         #include "CourantNo.H"
  60
  61         sgsModel->correct();
  62
  63         fvVectorMatrix UEqn
  64         (
  65             fvm::ddt(U)
  66           + fvm::div(phi, U)
  67           + sgsModel->divDevBeff(U)
  68          ==
  69             flowDirection*gradP
  70         );
  71
  72         if (momentumPredictor)
  73         {
  74             solve(UEqn == -fvc::grad(p));
  75         }
  76
  77
  78         // --- PISO loop
  79
  80         volScalarField rUA = 1.0/UEqn.A();
  81
  82         for (int corr = 0; corr < nCorr; corr++)
  83         {
  84             U = rUA*UEqn.H();
  85             phi = (fvc::interpolate(U) & mesh.Sf())
  86                 + fvc::ddtPhiCorr(rUA, U, phi);
  87
  88             adjustPhi(phi, U, p);
  89
  90             for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
  91             {
  92                 fvScalarMatrix pEqn
  93                 (
  94                     fvm::laplacian(rUA, p) == fvc::div(phi)
  95                 );
  96
  97                 pEqn.setReference(pRefCell, pRefValue);
  98
  99                 if (corr == nCorr-1 && nonOrth == nNonOrthCorr)
 100                 {
 101                     pEqn.solve(mesh.solutionDict().solver(p.name() + "Final"));
 102                 }
 103                 else
 104                 {
 105                     pEqn.solve(mesh.solutionDict().solver(p.name()));
 106                 }
 107
 108                 if (nonOrth == nNonOrthCorr)
 109                 {
 110                     phi -= pEqn.flux();
 111                 }
 112             }
 113
 114             #include "continuityErrs.H"
 115
 116             U -= rUA*fvc::grad(p);
 117             U.correctBoundaryConditions();
 118         }
 119
 120
 121         // Correct driving force for a constant mass flow rate
 122
 123         // Extract the velocity in the flow direction
 124         dimensionedScalar magUbarStar =
 125             (flowDirection & U)().weightedAverage(mesh.V());
 126
 127         // Calculate the pressure gradient increment needed to
 128         // adjust the average flow-rate to the correct value
 129         dimensionedScalar gragPplus =
 130             (magUbar - magUbarStar)/rUA.weightedAverage(mesh.V());
 131
 132         U += flowDirection*rUA*gragPplus;
 133
 134         gradP += gragPplus;
 135
 136         Info<< "Uncorrected Ubar = " << magUbarStar.value() << tab
 137             << "pressure gradient = " << gradP.value() << endl;
 138
 139         runTime.write();
 140
 141         #include "writeGradP.H"
 142
 143         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 144             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 145             << nl << endl;
 146     }
 147
 148     Info<< "End\n" << endl;
 149
 150     return 0;
 151 }
 152
 153
 154 // ************************************************************************* //