[petsc-users] Infinite or not-a-number generated in norm!

[Dominik Szczerba]

> You could very well be producing a singular linear system (with large
> unknown null space). I'm not sure why you want to do this. There are methods
> to solve for periodic behavior and you could choose a turbulence model in
> order to produce a steady state.

Yes, I want to get a time averaged steady state. I am able to do this
with another (pressure correction) solver, was just comparing.
And you gave me a very good hint: I do not have a turbulence model,
but I have streamline diffusion, which if increased, makes the crash
go away, which indeed seams to indicate a singular system.

Thanks,
Dominik