[petsc-users] Additive Schwarz sub-domain definition

[Sebastian Skatulla]

Hello 

I am struggling to solve an incompressible solid mechanics problem using
a meshfree code based on Moving Least Square approximations. My
knowledge of solvers and preconditioners is quite limited. But it seems
that Additive Schwarz or Gram Schmidt preconditioners together with
GMRES is a good choice - yet still not good enough in my case. So, I was
experimenting with exact (LU) solves in each subdomain which does the
trick but the memory need is significant. Now, my question is what
purpose serves the function PCASMSetOverlap and could it be used to
improve this setup in any way? Thanks.

Regards,
Sebastian
-- 
Dr Sebastian Skatulla
Department of Civil Engineering
University  of Cape Town
Cape Town
South Africa