[MOAB-dev] ghost/halo elements

[Vijay S. Mahadevan]

Ryan,

You need to use the ParallelComm object in MOAB to call
exchange_ghost_cells [1] with appropriate levels of ghost layers for
your mesh. This needs to be done after the mesh is loaded, or you can
pass this information also as part of the options when loading a file
and MOAB will internally load the file with ghosted layers. Here's an
example [2].

Vijay

[1] http://ftp.mcs.anl.gov/pub/fathom/moab-docs-develop/classmoab_1_1ParallelComm.html#a55dfa308f56fd368319bfb4244428878
[2] http://ftp.mcs.anl.gov/pub/fathom/moab-docs-develop/HelloParMOAB_8cpp-example.html
On Mon, Oct 8, 2018 at 1:23 PM Ryan O'Kuinghttons
<ryan.okuinghttons at noaa.gov> wrote:
>
> Hi, I am wondering if there is a way to create ghost elements in MOAB.
> By this I mean a list of copies of elements surrounding a specific MOAB
> element, ghost elements may exist on a different processor than the
> source element. I see a ghost_elems class in the appData namespace, but
> there is not much documentation on how to use it.. Thank you,
>
> --
> Ryan O'Kuinghttons
> Cherokee Nation Management and Consulting
> NESII/NOAA/Earth System Research Laboratory
> ryan.okuinghttons at noaa.gov
> https://www.esrl.noaa.gov/gsd/nesii/
>