laplacianFoam.C

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-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Application
    laplacianFoam
 
Description
    Solves a simple Laplace equation, e.g. for thermal diffusion in a solid.
 
\*---------------------------------------------------------------------------*/
 
#include "argList.H"
#include "fvModels.H"
#include "fvConstraints.H"
#include "simpleControl.H"
 
#include "fvmLaplacian.H"
 
using namespace Foam;
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
int main(int argc, char *argv[])
{
    #include "setRootCase.H"
 
    #include "createTime.H"
    #include "createMesh.H"
 
    simpleControl simple(mesh);
 
    #include "createFields.H"
 
    // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
    Info<< "\nCalculating temperature distribution\n" << endl;
 
    while (simple.loop(runTime))
    {
        Info<< "Time = " << runTime.userTimeName() << nl << endl;
 
        fvModels.correct();
 
        while (simple.correctNonOrthogonal())
        {
            fvScalarMatrix TEqn
            (
                fvm::ddt(T) - fvm::laplacian(DT, T)
             ==
                fvModels.source(T)
            );
 
            fvConstraints.constrain(TEqn);
            TEqn.solve();
            fvConstraints.constrain(T);
        }
 
        #include "write.H"
 
        Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
            << "  ClockTime = " << runTime.elapsedClockTime() << " s"
            << nl << endl;
    }
 
    Info<< "End\n" << endl;
 
    return 0;
}
 
 
// ************************************************************************* //