This isn't a dealii problem and I am sorry if this isn't the right place to post to, but if there is someone who could give me some hints on how I would approach this then it would be you guys.
I have been trying to solve the time harmonic maxwell equation discritized with the use of Nedelec elements. Details are in This stack overflow post <https://scicomp.stackexchange.com/questions/37447/how-to-create-a-good-preconditioner-for-a-system-of-linear-equations-that-is-cre> . I have an issue with the linear system, since using any black box Trilinos preconditioner yields no convergence or worse convergence than a simple Jaccobi or an identity preconditioner and even in that case the restarted GMRES solver needs more than 400 vectors to converge and it gets worse with a refined mesh. My system is broken into 2x2 block matrices much like step-29 by the way. Creating a multigrid solver like step-16 might solve this issue but I would rather use that as plan B. Any hint is appreciated. Thanx :3 Abbas -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/6be07afd-4418-4917-b68f-39cd7c9d1b4dn%40googlegroups.com.
