[petsc-users] ex12 with Neumann BC

[Matthew Knepley]

On Thu, Sep 26, 2013 at 6:04 AM, Olivier Bonnefon <
olivier.bonnefon at avignon.inra.fr> wrote:

> Hello,
>
> I have implemented my own system from ex12.c. It works with Dirichlet BC,
> but failed with Neumann one.
>
> So, I'm came back to the example /src/snes/example/tutorial/**ex12.c, and
> I tried with Neumann BC:
>
> ./ex12 -bc_type NEUMANN
>

Here is the full list of tests I run (just checked that it passes in
'next'):


https://bitbucket.org/petsc/petsc/src/f34a81fe8510aa025c9247a5b14f0fe30e3c0bed/config/builder.py?at=master#cl-175

Make sure you use an interpolated mesh with Neumann conditions since you
need faces.

   Matt


> This leads to the following crach:
>
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------**------
> [0]PETSC ERROR: No support for this operation for this object type!
> [0]PETSC ERROR: Unsupported number of vertices 0 in cell 8 for element
> geometry computation!
> [0]PETSC ERROR: ------------------------------**
> ------------------------------**------------
> [0]PETSC ERROR: Petsc Release Version 3.4.2, Jul, 02, 2013
> [0]PETSC ERROR: See docs/changes/index.html for recent updates.
> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
> [0]PETSC ERROR: See docs/index.html for manual pages.
> [0]PETSC ERROR: ------------------------------**
> ------------------------------**------------
> [0]PETSC ERROR: ./ex12 on a arch-linux2-c-debug named pcbiom38 by olivierb
> Thu Sep 26 14:53:32 2013
> [0]PETSC ERROR: Libraries linked from /home/olivierb/SOFT/petsc-3.4.**
> 2/arch-linux2-c-debug/lib
> [0]PETSC ERROR: Configure run at Thu Sep 26 14:44:42 2013
> [0]PETSC ERROR: Configure options --with-debugging=1 --download-fiat
> --download-scientificpython --download-generator --download-triangle
> --download-ctetgen --download-chaco --download-netcdf --download-hdf5
> [0]PETSC ERROR: ------------------------------**
> ------------------------------**------------
> [0]PETSC ERROR: DMPlexComputeCellGeometry() line 732 in
> /home/olivierb/SOFT/petsc-3.4.**2/src/dm/impls/plex/**plexgeometry.c
> [0]PETSC ERROR: DMPlexComputeResidualFEM() line 558 in
> /home/olivierb/SOFT/petsc-3.4.**2/src/dm/impls/plex/plexfem.c
> [0]PETSC ERROR: SNESComputeFunction_DMLocal() line 75 in
> /home/olivierb/SOFT/petsc-3.4.**2/src/snes/utils/dmlocalsnes.c
> [0]PETSC ERROR: SNESComputeFunction() line 1988 in
> /home/olivierb/SOFT/petsc-3.4.**2/src/snes/interface/snes.c
> [0]PETSC ERROR: SNESSolve_NEWTONLS() line 162 in
> /home/olivierb/SOFT/petsc-3.4.**2/src/snes/impls/ls/ls.c
> [0]PETSC ERROR: SNESSolve() line 3636 in /home/olivierb/SOFT/petsc-3.4.**
> 2/src/snes/interface/snes.c
> [0]PETSC ERROR: main() line 582 in "unknowndirectory/"/home/**
> olivierb/solvers/trunk/**SandBox/PETSC/LANDSCAPE/REF/**ex12.c
> ------------------------------**------------------------------**
> --------------
> MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
> with errorcode 56.
>
> NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
> You may or may not see output from other processes, depending on
> exactly when Open MPI kills them.
> ------------------------------**------------------------------**
> --------------
>
> With Gbd, I saw that DMPlexGetConeSize is 0 for the last point.
>
> Do I have forget a step to use Neumann BC ?
>
> Thanks
> Olivier Bonnefon
>
> --
> Olivier Bonnefon
> INRA PACA-Avignon, Unité BioSP
> Tel: +33 (0)4 32 72 21 58
>
>


-- 
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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