Re: [Libmesh-users] Periodic boundaries for circular segment domains

[John P. <jwp...@gm...>]

On Wed, Feb 28, 2018 at 8:11 PM, David Knezevic <dav...@ak...>
wrote:

> 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?
>

We have support for user-defined forward and inverse periodic boundary
transform functions in MOOSE if you'd like to check and see how it's done
there.

-- 
John