[samiam1000]

Dear All,

I am trying to simulate the flow in a divergent channel.

The geometry is attached. I fix the U at the inlet and a pressure at the outlet. I am using the k-omega model for turbulence.

On the 2 sides, I am imposing cyclic BC.

What happened is that I get a velocity in the z direction and the simulation never converges. Do you have any idea about how to model this?

Thanks a lot,
Samuele.

[wyldckat]

Greetings Samuele,

So... there is no clear indication if you're simulation this with a steady-state or transient solver, nor which solver you're using. And there is no clear indication about the mesh you're using, which might possibly be the reason why you're not getting a converged solution.

Therefore, based on the information you're providing, I can only deduce that you should not be using a cyclic BC on the Z direction and should instead use slip walls or symmetry patches.

Best regards,
Bruno

[jherb]

Could you please post your files of the 0 directory. This will it make much easier to debug your case.

[samiam1000]

Pardon for the late reply. I am attaching the whole case.

Also, it is a stedy simulation and I am using the simpleFoam solver.

Thanks a lot for any help,
Samuele