[petsc-users] DMPlex distribution with FVM adjacency

[Matthew Knepley]

On Thu, May 25, 2017 at 1:58 PM, Lawrence Mitchell <
lawrence.mitchell at imperial.ac.uk> wrote:

>
> > On 25 May 2017, at 19:46, Matthew Knepley <knepley at gmail.com> wrote:
> >
> > Sounds like DG. I will get out my dead chicken for the incantation
>
> Actually no!  Mixed H(div)-L2 for Stokes.  Which has facet integrals for
> partially discontinuous fields.  If you do redundant compute for such
> terms, you need a depth-2 FEM adjacency, which is just grim.  Equally we
> have some strange users who have jump terms in CG formulations.


Hmm, I thought I made adjacency per field. I have to look. That way, no
problem with the Stokes example. DG is still weird.

  Matt


>
> Lawrence




-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

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