[Nek5000-users] amg solver

[nek5000-users at lists.mcs.anl.gov]

Note, the AMG section of the documentation is outdated (see issues on NekDoc).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:nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
> Sent: Friday 27th October 2017 12:19
> To: nek5000-users at lists.mcs.anl.gov
> 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.
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