Hello,
I am trying to solve a linear system with KSP for a 3-D domain. The
computational domain is a cubic space with Neumann condition on the lateral
sides( y, and z directions). A smaller round plate is on the left side in x
direction. The right side is a rectangular plane either with or without a
hole. In testing studies, the KSP solver works fine both with and without
-pc_type hypre runtime option for the domain with a whole plane(without a hole)
on the right, but diverges for the case of a plane with a hole with -ps_type
hypre option.
My question is whether the hypre pre-conditioner is sensitive to the geometry
boundary? If the answer is yes, is there any other pre-conditioner available
for my particular case(the domain with a plane which with a hole on the right
side) to reduce the number of iterations? Thanks in advance.
