[petsc-dev] Stokes and saddle point solvers in PETSc?

[Barry Smith]

On Jun 14, 2011, at 7:59 PM, Jed Brown wrote:

> On Wed, Jun 15, 2011 at 02:53, Barry Smith <bsmith at mcs.anl.gov> wrote:
>  It seems we should provide a DMSDA that is built specifically for staggered grids, with the correct number of "slots" in the correct "locations", it would have appropriate grid hierarchies and interpolation/restriction. Not terribly hard but a bit of basic plumbing code. I would rather have this then try to "tack on" the current DA a bunch more stuff.
> 
> Yeah, though there are many different staggered discretizations so this could end up being a big project. Not conceptually hard, just a lot of code. DMDA is already not especially small.

  DMDA started out small. DMSDA will start out small :-)

  Actually before we do DMSDA we probably should do a code review of DM, then of DMDA and slim down DMDA a good amount.

  
   Barry