[petsc-users] Pre-conditioner for parallel CFD simulation

[Thomas Witkowski]

Jed Brown wrote:
> On Thu, Apr 14, 2011 at 20:22, Denner, Fabian 
> <f.denner09 at imperial.ac.uk <mailto:f.denner09 at imperial.ac.uk>> wrote:
>
>     It's Finite Volume, co-located grid arrangement, stabilized, with
>     a continuous pressure field at CFL numbers < 1 (typically 0.3-0.7).
>
>
> Much easier, it is likely that a relatively standard coupled multigrid 
> will work. If you order unknowns so they are interlaced 
> (u0,v0,w0,p0,u1,v1,...) and MatSetBlockSize(A,4) and/or use the BAIJ 
> format, you stand a good chance with -pc_type ml and reasonable 
> smoothers. Or you may have access to a geometric hierarchy?
Which package must be installed to make use of "ml" (algebraic 
multigrid?) as a preconditioner?

Thomas