CourantNo.H

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
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/>.
 
Global
    CourantNo
 
Description
    Calculates and outputs the mean and maximum Courant Numbers.
 
\*---------------------------------------------------------------------------*/
 
scalar CoNum = 0.0;
scalar meanCoNum = 0.0;
 
if (mesh.nInternalFaces())
{
    surfaceScalarField phiMask
    (
        localMin<scalar>(mesh).interpolate(cellMask + interpolatedCells)
    );
 
    scalarField sumPhi
    (
        fvc::surfaceSum(mag(phiMask*phi))().internalField()
    );
 
    CoNum = 0.5*gMax(sumPhi/mesh.V().field())*runTime.deltaTValue();
 
    meanCoNum =
        0.5*(gSum(sumPhi)/gSum(mesh.V().field()))*runTime.deltaTValue();
}
 
Info<< "Courant Number mean: " << meanCoNum
    << " max: " << CoNum << endl;
 
// ************************************************************************* //