Does anyone have some experiences with MARS discretization shcee? I have tried it in the buoyancy flow as suggested by STAR-CD manual. But at some locations I got negative value of temperature where I define the initial and amibient temperatrue is positive throughout the whole domain. When I changed to SFCD scheme, all look correct.

In the methodology manual, I could not find the detailed information about the MARS scheme, do anyone have the same experience with me and tell me what's the limitation of MARS scheme?

Thanks!

As I remember, MARS scheme is advised for momentum equations. For temperature and dencity SFCD is recommended.

I use MARS for momentum and turbulence and whould like to know more about it, too.

Thanks for your suggestion!

But in the tutorial of STAR-CD, (10.1) It was suggested that the MARS is applied for UVW and T and DENS, and turbulence energy and dissipiancy are using UD scheme. Is there any other suggestion for it?

I've never tried MARS for T and DENS, I use SFCD for them. And for some problems I couldn't get convergence with UD for turbulence.

I've tried different schemes for a laminar flow in a square duct with 90 degrees turn. MARS makes little difference with QUICK.