Olivier, I don't think what you want to do is possible. deal.II delegates the load balancing and the re-distribution to p4est. My understanding is that p4est cannot do what you ask and therefore deal.II can't do it either.
Best, Bruno On Friday, August 26, 2022 at 8:36:13 AM UTC-4 [email protected] wrote: > I am working at the french "Alternative Energies and Atomic Energy > Commission" on a quite generic library which deals with > finite-elements/finite-volumes/discontinuous-galerkin/... in a large field > of applications in a HPC framework. > > In this library, we use external libraries to deal with distributed > meshes, and we already have 2 "mesh backends'' (based on moab ( > https://sigma.mcs.anl.gov/moab-library/) and pumi ( > https://scorec.rpi.edu/pumi/)). We would like to enable non-conrforming > AMR functionalities, but none of these 2 backends handle non-conforming > meshes... So we are thinking about using the "Triangulation" module of > dealii as a new mesh backend which handles non-corforming mesh refinement. > > A rather important aspect of our software design is that we can "migrate" > cells between processes, either deleting the cells on the source process > (for load balancing for instance), or letting them on the source process > and importing them as "ghost cells" on the destination process (even if > they are not located "near" the boundary of the destination subdomain). > > But after a first insight, I feel that it may be not straightforward to > add/remove some cells or vertices (on the coarse mesh) "one by one" with > dealii's "Triangulations". We mainly use these functionalities within our > "migration" processes. I assume that there is an equivalent migration > process within dealii to deal with load balancing, and maybe we could use > them out of the box. But our "migration as ghosts" process, in which a > subdomain can import any cell from the other process as a ghost cell, seems > to be less common... > > Will it be possible with dealii's "Triangulation" module to: > - either add/remove some cells "one by one", > - or doing such a "migration as ghost" out of the box ? > > Thank for helping, > Best regards, > Olivier Jamond > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/05f2b566-35d2-4e71-a4a9-322c59b2a288n%40googlegroups.com.
