hi
On 21/05/14 22:43, Matthew Knepley wrote:
On Wed, May 21, 2014 at 12:46 AM, Jed Brown <j...@jedbrown.org
<mailto:j...@jedbrown.org>> wrote:
Adrian Croucher <a.crouc...@auckland.ac.nz
<mailto:a.crouc...@auckland.ac.nz>> writes:
> In the 'PhysicsCreate' functions there are calls to
DMPlexAddBoundary(),
> which takes an array of IDs; e.g. in PhysicsCreate_SW() the IDs are
> {100,101,200,300}. It looks like these IDs define where the BCs are
> applied, but what do these numbers actually refer to?
They are numbered "face sets" on the Cubit-generated example mesh.
1) Cubit has a notion of Face Set, which are groups of faces in the mesh
2) These sets are written out as Face Sets in the ExodusII format
3) PETSc reads in the ExodusII format and creates a label names Face Sets,
where the value is the set label (like 101) and the points are
the set members.
Right, thanks very much for explaining that. I had been looking in the
code to see where those Face Sets label values were being set up- hadn't
realised they were in the mesh file...
Cheers, Adrian
--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
University of Auckland, New Zealand
email: a.crouc...@auckland.ac.nz
tel: +64 (0)9 923 4611
