code_saturne User's Forum

Hi, I use code_saturne 4.3 and as part of my thesis I would like to use it to simulate air flow on the rough wall with turbulence model Rij-epsilon SSG. I have two questions about this:

_what are the boundary conditions for the Rij-epsilon model for the rough wall? I don't find this information on the documation.

_ what are the stability criteria provided by code_saturne?

Thanks for any help.

Hello,

I'll let the specialists answer for the boundary conditions (especially as there have been recent updates in 5.0 relative to this).

I'm not sure I understand the question relative to stability criteria. As the time-stepping is semi-implicit, CFL and Fourier numbers may apply, but the code usually converges even when they are not strictly followed (though it may diverge when the CFL becomes too high; 5 to 20 is usually not too risky).

Best regards,

Yvan