[petsc-users] Advices to decrease bicgstab iterations

[Jed Brown]

Edoardo alinovi <edoardo.alinovi at gmail.com> writes:

> Ps: I am solving Navier-Stokes equation (pressure-correction equation in
> particular).  The matrix is sparse and in mpiaij fotmat.

If you're just solving a pressure projection then you can and should use
multigrid.  For example, -pc_type gamg.