[Libmesh-users] Periodic boundaries for circular segment domains

[David K. <dav...@ak...>]

I have only seen periodic boundary condition examples in libMesh where
boundary B is a translation of boundary A. This is what is implemented in
PeriodicBoundary::get_corresponding_pos(), where we have "return pt +
translation_vector;"

I would like to implement a periodic boundary condition on a model with
circular symmetry, e.g. solve on sector of a disk with periodicity. To
implement this it seems like all I'd need to do is subclass
PeriodicBoundary and override get_corresponding_pos() to impose the
appropriate rotation rather than just a translation, and then add the
PeriodicBoundary subclass object to the system in the usual way. Is that
indeed all that's required, or would we need something more? Has anyone
tried this case before?

Thanks,
David