[petsc-users] Convergence is different with different processors

[w_ang_temp]

Hello,
    I use the same project, but I find that when different number of processors 
is choosed,
the convergence is different. For example, when the processors are 4, it is 
divergent; when
the processors are 8, it is convergent.
    So what is the reason?
    Thanks.
                                   Jim.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: 
<http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130207/dc4d55e5/attachment.html>