multizone motion

Topic raised by @Prashant - would be useful to apply motion to multiple zones.

To use groups, the following snippet (zoneMotion.C) should probably work:

    labelList cellIDs;
    if (!cellZoneName.empty() && cellZoneName != "none")
    {
        Info<< "Applying solid body motion to cellZone "
            << cellZoneName << endl;

        // Also handles groups...
        labelList zoneIDs = mesh.cellZones().indices(cellZoneName);

        if (zoneIDs.empty())
        {
            FatalErrorInFunction
                << "Unable to find cellZone " << cellZoneName
                << ".  Valid cellZones are:"
                << mesh.cellZones().names()
                << exit(FatalError);
        }

        cellIDs = mesh.cellZones().selection(zoneIDs).sortedToc();
    }

Could be useful to accept a wordRe or even a wordRes for specifying the zones.

Additional point raised by @Prashant - could be useful to specify 'inGroups' as an optional parameter for set-to-zone topo actions. Probably no future naming conflicts with that as a keyword, but open to other ideas (@andy @kuti @Mattijs @Sergio)

mentioned in commit f0f893c4

closed

assigned to @mark

mentioned in issue #2497