It depends how you want to solve the problem. I usually group all dofs together. There is a 2D Stokes+Thermodynamics example in SNES ex30 (or 31?). On Jun 16, 2012 8:11 AM, "TAY wee-beng" <zonexo at gmail.com> wrote:
> Hi, > > I'm abit unclear about dof used in DMDACreate3d. If I have u,v,w for my > CFD code, does it mean that I should have dof = 3? Or can i create 3 > local/global vector using DMCreateGlobalVector and DMCreateLocalVector to > define u,v,w? > > Does it matter if I'm using staggered grids? Also, if I am only using > PETSc for u,v,w (and not pressure, which uses HYPRE), does it mean a > difference? > > I remember there 's an example using staggered grid somewhere but I can't > find it now. May I know which PETSc 's example it is? > > Thanks! > > -- > Yours sincerely, > > TAY wee-beng > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120616/90afbb27/attachment.html>
