Poiseuille profil, Stokes , Uzawa

General Discussion
1

Hi everyone,

I am new to this amazing world of FreeFem users and I am having some issues with my work on a Poiseuille profil for Stokes equations with the Uzawa method.
My results are totally wrong but I don’t see what I have to change.
Could you give me some advice or recommandations to improve my work.

Thanks for your time.

2

If you are looking for something much more efficient than Uzawa method, you can look at PETSc examples, e.g., stokes-fieldsplit-3d-PETSc.edp, which also solves Stokes equations with a Poiseuille inflow.

1 Like
3

Thanks for you answer, I have already solved the problem with another method, but i have to compare it with the Uzawa one (that’s the work I am ask to do). I think my problem is maybe link to how I apply boundaries conditions and the labels identification.

4

Have a look on my PhD dissertation, there is a complete Uzawa algorithm in the appendix