I’m new in LBM and trying to use SmargorinskyBGKDynamics to simulation a High Reynoalds flow but the result is always diverging.
I consider the material as air crossing a 1m*1m*5m wind tunnel , parameters like belows
I doubt there is any fault in the parameters. If I change the CharNu higher such as 1e-3, the result seemed good.
Periodic BC might be more stable. We also have free outflow conditions. Please have a look in the dogygen documentation. It is called “convection” BC and simular to the one paper of Junk form Konstanz.