Note, the AMG section of the documentation is outdated (see issues on NekDoc). To use the AMG solver set p40=1 (for .rea) or solver=semg_amg (in pressure section for .par file). This will dump all required AMG setup files. Then run amg_hypre (part of our tools) in your case directory. Now just run Nek5000 again. Cheers, Stefan -----Original message-----

From:[email protected] <[email protected]> Sent: Friday 27th October 2017 12:19 To: [email protected] Subject: [Nek5000-users] amg solver

Dear Neks,

Recently I decide to use the amg solver. I had done all preparations from github documentation, but it did not work for the first time. After this I look throw the forum and catch up the topic about amg dump. It was said that p40 in rea file is bound with amg solver, although official manual says that p40 "NOT IN USE". Since I set the p40 to 1 the amg solver starts to work (amg dump and after amg solver). So I want to clarify, what exactly does this p40 parameter ? And perhaps is there any additional flag or parameters (except ifamg and ifamg_dump) that I need to do for make amg solver works correctly in my simulation? <br clear="all" />All Regards, Vatslav. _______________________________________________ Nek5000-users mailing list [email protected] https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users