Re: [petsc-users] Overcoming slow convergence with GMRES+Hypre BoomerAMG

2023-03-21 Thread Matthew Knepley
On Tue, Mar 21, 2023 at 10:28 AM Christopher, Joshua wrote: > Hi Matt, > > Sorry for the unclear explanation. My layout is like this: > > Proc 0: Rows 0--499 and rows 1000--1499 > Proc 1: Rows 500-999 and rows 1500-1999 > That is not a possible layout in PETSc. This is the source of the misunder

Re: [petsc-users] Overcoming slow convergence with GMRES+Hypre BoomerAMG

2023-03-21 Thread Christopher, Joshua via petsc-users
Hi Matt, Sorry for the unclear explanation. My layout is like this: Proc 0: Rows 0--499 and rows 1000--1499 Proc 1: Rows 500-999 and rows 1500-1999 I have two unknowns, rho and phi, both correspond to a contiguous chunk of rows. Phi: Rows 0-999 Rho: Rows 1000-1999 My source data (an OpenFOAM m