[petsc-users] Using HYPRE AMG for only one of the linear eqns

[TAY wee-beng]

Hi,

No I'm not. Will using ptype2 or ksptype2 work?

Yours sincerely,

TAY wee-beng


On 24/12/2011 3:07 PM, Matthew Knepley wrote:
> On Sat, Dec 24, 2011 at 7:42 AM, TAY wee-beng <zonexo at gmail.com 
> <mailto:zonexo at gmail.com>> wrote:
>
>     Hi,
>
>     I am solving 4 linear equations in my cfd code. I have declared
>     them as:
>
>     KSP   ksp,ksp_semi_x,ksp_semi_y,ksp_semi_z
>
>     PC    pc,pc_semi_x,pc_semi_y,pc_semi_z
>
>     PCType      ptype
>
>     KSPType        ksptype
>
>     However, I only want to solve the 1st eqn via hypre (thru command
>     prompt), and the others via KSPBCGS.
>
>     I now add:
>
>     ksp_type richardson -pc_type hypre -pc_type_hypre boomeramg
>
>     Are all the eqns now solved using hypre?
>
>     How should I specify in the command prompt?
>
>
>
> Are you using DMDA? If so, its easy to do PCFIELDSPLIT from the 
> command line.
>
>    Matt
>
>
>
>     -- 
>     Yours sincerely,
>
>     TAY wee-beng
>
>
>
>
> -- 
> 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-users/attachments/20111224/80e0206f/attachment-0001.htm>