On Wed, Oct 5, 2016 at 12:11 PM, Boris Boutkov <boris...@buffalo.edu> wrote:
> Hello all,
>
> I was wondering what algorithm or method libMesh uses to renumber nodes
> and elements, particularly after uniform mesh refinements or after
> equation_system reinits.
>
> I understand that its designed to help create contiguous blocks on
> processors, but was wondering if there are any more details you can provide
> as to the details of the implementation such as the specific method used.
> For context, I'm investigating how much the node ordering can affect
> Multigrid convergence rates when comparing different node numbering
> algorithms.
>
I don't think it is necessarily designed to create contiguous blocks on
processors, although it might do that for Cartesian grids?
If you look at ReplicatedMesh::renumber_nodes_and_elements (), you can see
the algorithm that's used for ReplicatedMesh.
--
John
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