[petsc-users] Agglomeration for Multigrid on Unstructured Meshes
Danyang Su
danyang.su at gmail.com
Mon Jun 1 18:02:21 CDT 2020
Thanks Jed for the quick response. Yes I am asking about the repartitioning of coarse grids in geometric multigrid for unstructured mesh. I am happy with AMG. Thanks for letting me know.
Danyang
On 2020-06-01, 1:47 PM, "Jed Brown" <jed at jedbrown.org> wrote:
I assume you're talking about repartitioning of coarse grids in
geometric multigrid -- that hasn't been implemented.
https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCTELESCOPE.html
But you can use an algebraic multigrid that does similar communicator
reduction, and can be applied to the original global problem or just on
the "coarse" problem of an initial geometric hierarchy.
Danyang Su <danyang.su at gmail.com> writes:
> Dear All,
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> I recalled there was a presentation ‘Extreme-scale multigrid components with PETSc’ taling about agglomeration in parallel multigrid, with future plan to extend to support unstructured meshes. Is this under development or to be added?
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> Thanks and regards,
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> Danyang
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