On Thu, 13 Sep 2012, Derek Gaston wrote: > I haven't looked at that problem and don't know much about curl-curl > spaces... but if the matrix would respond to multigrid at all I highly > recommend compiling PETSc with Hypre support and using: > -pc_type hypre -pc_hypre_type boomeramg > > For problems where it works it can't be beat...
"Where it works" is the tricky part. It seems to fly on the curl-curl problem, which is great; it failed to converge on a navier-stokes problem I just tried, which rules it out as a default LIBMESH_OPTIONS for me but still makes it a reasonable candidate for further consideration... except that the very *first* time I tried PETSc with boomeramg, like 5 years ago, it was "converging" to inaccurate answers on some of the runs I tried. I'm 99% sure they'll have fixed whatever was wrong by now, but once bitten twice shy... --- Roy ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
