foam-extend4.1-coherent-io/applications/solvers/heatTransfer/chtMultiRegionFoam/include/setInitialMultiRegionDeltaT.H

/*---------------------------------------------------------------------------*\
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   \\    /   O peration     | Version:     4.0
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    General Public License for more details.

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Global
    setInitialDeltaT

Description
    Set the initial timestep for the CHT MultiRegion solver.

\*---------------------------------------------------------------------------*/

if (adjustTimeStep)
{
    if ((runTime.timeIndex() == 0) && ((CoNum > SMALL) || (DiNum > SMALL)))
    {

        if (CoNum == -GREAT)
        {
            CoNum = SMALL;
        }

        if (DiNum == -GREAT)
        {
            DiNum = SMALL;
        }

        runTime.setDeltaT
        (
            min
            (
                min(maxCo/CoNum, maxDi/DiNum)*runTime.deltaT().value(),
                maxDeltaT
            )
        );
        Info<< "deltaT = " <<  runTime.deltaT().value() << endl;
    }
}

// ************************************************************************* //