On Thu, Dec 15, 2011 at 10:23 AM, Ravi Kannan <rxk at cfdrc.com> wrote:
> Dear All,**** > > ** ** > > This is Ravi Kannan from CFD Research Corporation. Recently, we are > experimenting with the BoomerAMG preconditioner for some ?stiff? CFD > problems. In that regard, all the other standard solver-preconditioner > combinations failed for the current CFD problem. The boomer is the only one > which is able to provide with ?converged? solutions.**** > > ** ** > > We noticed that the scalability of this boomer preconditioner is really > poor. For instance, even with a cell size of 2 million, we cannot scale to > even 16 partitions (in contrast, the other solver-preconditioner > combinations like the BI-CGS/BJacobi gave good enough scalability).**** > > ** ** > > Are we missing something? Do we need to use a more latest version of > boomer? > Have you tried -pc_type gamg in petsc-dev? Matt > Thanks,**** > > Ravi. **** > > > -- 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-dev/attachments/20111215/872929fa/attachment.html>