[petsc-users] petsc-3.5.2: ex12 with Neumann BC

[Matthew Knepley]

On Fri, Oct 31, 2014 at 10:43 AM, Olivier Bonnefon <
olivier.bonnefon at avignon.inra.fr> wrote:

> Hello,
>
> I'm working on the snes/examples/tutorial/ex12 version 3.5.2.
>
> I didn't succed to run the simplest case with Neumann BC:
>
> ./ex12 -run_type full -refinement_limit 0.0    -bc_type neumann
> -interpolate 1 -petscspace_order 1 -show_initial -dm_plex_print_fem 1
> -show_solution -bd_petscspace_order 1 -snes_linesearch_monitor
> -snes_monitor -ksp_monitor_true_residual -snes_converged_reason
> -ksp_converged_reason
>
> This leads to dofs negatives values.
>

I do not understand what you mean. Please always mail the full error
message.


> Do you know the options to get a correct result with Neumann BC ?
>

There are some tests here:

https://bitbucket.org/petsc/petsc/src/fced3c3f9e703542693913793d15321603e40fe6/config/builder.py?at=master#cl-257

   Matt


> Regards,
> Olivier Bonnefon
>
>


-- 
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20141031/f75b0661/attachment.html>