[nima_nzm]

Dear Friends,

I am trying to model flow around a 2D cylinder in Fluent 6.3 and capture vortices shedding. I did the same project in Reynolds number ranging 100-4500 with reasonable results. But now I am doing a project with Air as fluid and cylinder diameter of 0.05 m. other specifications are:

V = 10 m/s
Solver = unsteady 2nd order
Viscous = k-e standars
solution=second order upwind
time step=0.005
time = up to 100 s (even more sometimes)

My reynolds number is around 10000. I am not sure if I should expect von karman vortex street in this reynolds number. my result is only a fully developed and symmetric flow behind the cylinder without any vortex.
attached picture is contour of vorticity magnitude

Help me if there is a reynold range for vortex shedding in cylinder case.

Thanks