[petsc-users] Example for unstructured grid, metis, petsc

[Matthew Knepley]

On Mon, Aug 22, 2016 at 4:05 AM, Praveen C <cpraveen at gmail.com> wrote:

> Dear all
>
> We are developing a 3d unstructured grid finite volume code for
> compressible turbulent flows.
>
> Our approach is to use metis/parmetis to partition the mesh.
> Then read these partitioned mesh files in the MPI-based cfd code for
> computation.
>
> Are there any examples available in PETSc which are similar to this.
>

That is a pretty difficult problem. The closest example we have is probably
TS ex11, which can solve
things like the shallow water equation and Euler. Currently it reads in a
mesh, partitions in memory,
and distributes the mesh using MPI. After that it can regularly refine. In
the next release, we will
introduce the ability to

  - read a mesh in parallel

  - adaptively refine in parallel using the Pragmatic package

  - load balance after adaptive refinement

  - use adaptive quadtree meshes from p4est

  Thanks,

     Matt


> Thanks
> praveen
>
-- 
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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