[petsc-users] DMDA and vector PDE

[Jed Brown]

On Tue, Nov 1, 2011 at 09:08, Alexander Grayver <agrayver at gfz-potsdam.de>wrote:

> 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).
>

You set the number of degrees of freedom per node to 3. Then these vectors
are interlaced in b.
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