applications/solvers/incompressible/channelFoam/channelFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
   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     channelFoam
  27
  28 Description
  29     Incompressible LES solver for flow in a channel.
  30
  31 \*---------------------------------------------------------------------------*/
  32
  33 #include "fvCFD.H"
  34 #include "singlePhaseTransportModel.H"
  35 #include "LESModel.H"
  36 #include "IFstream.H"
  37 #include "OFstream.H"
  38 #include "Random.H"
  39
  40 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  41
  42 int main(int argc, char *argv[])
  43 {
  44     #include "setRootCase.H"
  45     #include "createTime.H"
  46     #include "createMesh.H"
  47     #include "readTransportProperties.H"
  48     #include "createFields.H"
  49     #include "initContinuityErrs.H"
  50     #include "createGradP.H"
  51
  52     Info<< "\nStarting time loop\n" << endl;
  53
  54     while (runTime.loop())
  55     {
  56         Info<< "Time = " << runTime.timeName() << nl << endl;
  57
  58         #include "readPISOControls.H"
  59
  60         #include "CourantNo.H"
  61
  62         sgsModel->correct();
  63
  64         fvVectorMatrix UEqn
  65         (
  66             fvm::ddt(U)
  67           + fvm::div(phi, U)
  68           + sgsModel->divDevBeff(U)
  69          ==
  70             flowDirection*gradP
  71         );
  72
  73         if (momentumPredictor)
  74         {
  75             solve(UEqn == -fvc::grad(p));
  76         }
  77
  78
  79         // --- PISO loop
  80
  81         volScalarField rUA = 1.0/UEqn.A();
  82
  83         for (int corr=0; corr<nCorr; corr++)
  84         {
  85             U = rUA*UEqn.H();
  86             phi = (fvc::interpolate(U) & mesh.Sf())
  87                 + fvc::ddtPhiCorr(rUA, U, phi);
  88
  89             adjustPhi(phi, U, p);
  90
  91             for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
  92             {
  93                 fvScalarMatrix pEqn
  94                 (
  95                     fvm::laplacian(rUA, p) == fvc::div(phi)
  96                 );
  97
  98                 pEqn.setReference(pRefCell, pRefValue);
  99
 100                 if (corr == nCorr-1 && nonOrth == nNonOrthCorr)
 101                 {
 102                     pEqn.solve(mesh.solver(p.name() + "Final"));
 103                 }
 104                 else
 105                 {
 106                     pEqn.solve(mesh.solver(p.name()));
 107                 }
 108
 109                 if (nonOrth == nNonOrthCorr)
 110                 {
 111                     phi -= pEqn.flux();
 112                 }
 113             }
 114
 115             #include "continuityErrs.H"
 116
 117             U -= rUA*fvc::grad(p);
 118             U.correctBoundaryConditions();
 119         }
 120
 121
 122         // Correct driving force for a constant mass flow rate
 123
 124         // Extract the velocity in the flow direction
 125         dimensionedScalar magUbarStar =
 126             (flowDirection & U)().weightedAverage(mesh.V());
 127
 128         // Calculate the pressure gradient increment needed to
 129         // adjust the average flow-rate to the correct value
 130         dimensionedScalar gragPplus =
 131             (magUbar - magUbarStar)/rUA.weightedAverage(mesh.V());
 132
 133         U += flowDirection*rUA*gragPplus;
 134
 135         gradP += gragPplus;
 136
 137         Info<< "Uncorrected Ubar = " << magUbarStar.value() << tab
 138             << "pressure gradient = " << gradP.value() << endl;
 139
 140         runTime.write();
 141
 142         #include "writeGradP.H"
 143
 144         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 145             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 146             << nl << endl;
 147     }
 148
 149     Info<< "End\n" << endl;
 150
 151     return 0;
 152 }
 153
 154
 155 // ************************************************************************* //