[petsc-users] DMDA and vector PDE

[Alexander Grayver]

Hello!

Sorry for possibly silly question. I've just recently started to use 
DMDA functionality.
I solve 3D vector PDE using FD, so my solution vector b has size 3N, 
where N stands for total number of grid cells.
Each part of b contains solution for corresponding dimension, i.e. fx = 
b(1:N), fy = b(N+1:2N), fz = b(2N+1:3*N).
The question is how can I link my DMDA layout created for grid with N 
cells and my solution vector b which
has size of 3N, but naturally represents just 3 separate vectors fx,fy,fz?

Thanks in advance.

Regards,
Alexander