code_saturne User's Forum

Hello!

I have a problem related to molecular and turbulent diffusion in Saturn Code.
I work on the model MIL I'm trying to integrated into Saturn. I get results too diffusive.
I constantly try to solve this without success. I'd like to know where imposing a constant coefficient diffusive if possible in Saturn.

Regards,
SAGUEDONG

Hello,

You could use the advanced user subroutines (usvist, in cs_user_physical_properties.f90 in recent versions), but excessive diffusion may also be due to a bad quality mesh, or using an upwind convection scheme (not the case by default, unless the slope test comes into play).

Regards,

Yvan