Thanks a lot Pierre, I use PCGAMG as I type this answer. Not only that it
works, but converges much faster than PCASM :-)
Have a great day,
Bojan
On Thu, Apr 20, 2023 at 8:07 AM Pierre Jolivet
wrote:
>
> > On 20 Apr 2023, at 7:53 AM, Bojan Niceno <
> bojan.niceno.scient...@gmail.com>
> On 20 Apr 2023, at 7:53 AM, Bojan Niceno
> wrote:
>
> Dear all,
>
>
> I am solving a Laplace equation with finite volume method on an unstructured
> grid with a Fortran code I have developed, and PETSc 3.19 library.
>
> I first used cg solver with asm preconditioner, which converges
Dear all,
I am solving a Laplace equation with finite volume method on an
unstructured grid with a Fortran code I have developed, and PETSc 3.19
library.
I first used cg solver with asm preconditioner, which converges nicely when
executed sequentially, but fails for MPI parallel version. I
