applications/solvers/heatTransfer/boussinesqBuoyantFoam/boussinesqBuoyantFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | foam-extend: Open Source CFD
   4    \\    /   O peration     |
   5     \\  /    A nd           | For copyright notice see file Copyright
   6      \\/     M anipulation  |
   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     boussinesqBuoyantFoam
  26
  27 Description
  28     Transient solver for buoyancy-driven laminar flow of incompressible
  29     Newtonian fluids using the Boussinesq Model
  30
  31 \*---------------------------------------------------------------------------*/
  32
  33 #include "fvCFD.H"
  34
  35 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  36
  37 int main(int argc, char *argv[])
  38 {
  39
  40 #   include "setRootCase.H"
  41
  42 #   include "createTime.H"
  43 #   include "createMesh.H"
  44 #   include "readTransportProperties.H"
  45 #   include "readGravitationalAcceleration.H"
  46 #   include "createFields.H"
  47 #   include "initContinuityErrs.H"
  48
  49 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  50
  51     Info<< "\nStarting time loop\n" << endl;
  52
  53     for (runTime++; !runTime.end(); runTime++)
  54     {
  55         Info<< "Time = " << runTime.timeName() << nl << endl;
  56
  57 #       include "readPISOControls.H"
  58 #       include "CourantNo.H"
  59
  60         fvVectorMatrix UEqn
  61         (
  62             fvm::ddt(U)
  63           + fvm::div(phi, U)
  64           - fvm::laplacian(nu, U)
  65          ==
  66            -beta*(T - T0)*g
  67         );
  68
  69         solve(UEqn == -fvc::grad(p));
  70
  71         // --- PISO loop
  72
  73         for (int corr = 0; corr < nCorr; corr++)
  74         {
  75             volScalarField rUA = 1.0/UEqn.A();
  76
  77             U = rUA*UEqn.H();
  78             phi = (fvc::interpolate(U) & mesh.Sf())
  79                 + fvc::ddtPhiCorr(rUA, U, phi);
  80
  81             adjustPhi(phi, U, p);
  82
  83             for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
  84             {
  85                 fvScalarMatrix pEqn
  86                 (
  87                     fvm::laplacian(rUA, p) == fvc::div(phi)
  88                 );
  89
  90                 pEqn.setReference(pRefCell, pRefValue);
  91                 pEqn.solve();
  92
  93                 if (nonOrth == nNonOrthCorr)
  94                 {
  95                     phi -= pEqn.flux();
  96                 }
  97             }
  98
  99 #           include "continuityErrs.H"
 100
 101             U -= rUA*fvc::grad(p);
 102             U.correctBoundaryConditions();
 103         }
 104
 105         // Solve energy equation
 106         solve
 107         (
 108             fvm::ddt(T)
 109           + fvm::div(phi, T)
 110           - fvm::laplacian(DT, T)
 111         );
 112
 113         rho = rho0*(scalar(1) - beta*(T - T0));
 114
 115         runTime.write();
 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 // ************************************************************************* //