Von Karman 2D Stable, no shedding

Stephen Mar

I am trying to simulate the shedding of Von Karman Vortices from a 2d cylinder. However I am only seeing steady no shedding results. I have read the posting on this site, which appear to indicate that a disturbance is required before the unsteady result will be achieved. If this is the case could someone give me an Idea of what disturbance is required and how I could go about it.

Cheers!! in advance!!

The problem is set up as follows Re = 70

V = 0.001

D = 1

Fluid = Air

Domain is ten cords with Circular shaped

Velocity inlet, and velocity outlet (No external walls)

Model = Laminar

Time step = 0.00001

Have tried altering the relaxation factors

Cheers!! in advance!!