windywires 
May 5, 2016 11:09 
Interesting pressure and velocity contours
I've been analysing the 2D flow over a notquitecircular cylinder in ANSYS Fluent. The analysis has been transient and run long enough to produce this lift coefficient plot. It oscillates at the vortex shedding frequency as would be expected and its timeaverage gives a lift coefficient of 0.307.
With this downwards lift in mind, I don't understand these total pressure and velocity magnitude plots. There seems to be higher pressure AND higher velocity on the underside of the shape, which would be impossible according to Bernoulli. Also, wouldn't the higher pressure underneath suggest upwards lift and give a positive lift coefficient? And what can can we interpret from the fact that the shed vortexes take a path at an angle to the flow?
I'd really appreciate your thoughts
