[petsc-users] Question on asm

[Konstantinos Kontzialis]

Dear all,

I am using asm as a preconditioner for solving the Navier Stokes 
equations. When using ILU as the subdomain preconditioner, I notice 
convergence problems in the partition boundaries.
This does not happen with the Jacobi preconditioner. Do I need to 
provide any connectivity, node mapping, and/or overlap information to 
Petsc before calling KSPsolve?

Thanks,

Kostas