[petsc-users] Local and Global numberings after DMPlexDistribute

Anthony Vergottis a.vergottis at ucl.ac.uk
Tue Nov 12 17:32:28 CST 2013

I would like to calculate the area of all the elements in my unstructured
mesh. This is the process that I have envisaged:

1) Partition the mesh with DMPlexDistribute.

2) Obtain which cell/vertices are owned by each process.

3) Have each process calculate the area of the cells it own, as I would
like to do this in parallel.

I hope this explains things a bit better.



On 12 November 2013 23:25, Matthew Knepley <knepley at gmail.com> wrote:

> On Tue, Nov 12, 2013 at 4:10 PM, Anthony Vergottis <a.vergottis at ucl.ac.uk>wrote:
>> Dear All,
>> How does one get the local and global numbers of nodes/elements on each
>> process after the DMPlexDistribute function has been used to partition the
>> mesh (DM object)?
> Can you be more explicit? Vertices and cells are renumbered after
> distribution to be contiguous on
> each process:
>   cell: [0, numCells)
>   vertices: [numCells, numCells+numVertices)
>    Matt
>> Are there any built in PETSc  functions that offer such functionality?
>> Thanks in advance.
>> Regards,
>> Anthony
> --
> 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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