CFD Online Discussion Forums - How to add 3rd region to chtMultiRegionFoam

Has anybody tried to extend chtMultiRegionFoam to 3 regions? For example, in the current chtMultiRegionFoam example, there are 2 regions: a fluidRegion and a solidRegion. I'm trying to make a third region (let's just call it fluidRegion2).

I don't know how to modify the coupleManager files though. Specifically this part in chtMultiRegionFoam/coupleManager/coupleManager.C:

Code:

bool Foam::coupleManager::regionOwner() const

{

    const fvMesh& nbrRegion = neighbourRegion();



    const regionProperties& props =

        localRegion_.objectRegistry::parent().lookupObject<regionProperties>

        (

            "regionProperties"

        );



    label myIndex = findIndex(props.fluidRegionNames(), localRegion_.name());

    if (myIndex == -1)

    {

        label i = findIndex(props.solidRegionNames(), localRegion_.name());



        if (i == -1)

        {

            FatalErrorIn("coupleManager::regionOwner() const")

                << "Cannot find region " << localRegion_.name()

                << " neither in fluids " << props.fluidRegionNames()

                << " nor in solids " << props.solidRegionNames()

                << exit(FatalError);

        }

        myIndex = props.fluidRegionNames().size() + i;

    }

    label nbrIndex = findIndex(props.fluidRegionNames(), nbrRegion.name());

    if (nbrIndex == -1)

    {

        label i = findIndex(props.solidRegionNames(), nbrRegion.name());



        if (i == -1)

        {

            FatalErrorIn("coupleManager::regionOwner() const")

                << "Cannot find region " << nbrRegion.name()

                << " neither in fluids " << props.fluidRegionNames()

                << " nor in solids " << props.solidRegionNames()

                << exit(FatalError);

        }

        nbrIndex = props.fluidRegionNames().size() + i;

    }



    return myIndex < nbrIndex;

}

At the moment my C++/OpenFOAM knowledge isn't good enough to figure out what's going on here, but I'm sure that this has to be modified if a third region is to be implemented. Has anybody done this or help me out?