Flow at Re = 1000 past a cylinder with = 3:0 with an impulsive start was
computed and instantaneous streamlines for the same parameters were compared with
the flow visualization and computational results from Badr et al. (1990). These are
shown in gure 1. Excellent agreement is observed between the computational results
for all times. However, there is some dierence between the experimental results
and those obtained from computations at larger times (t = 4 and 6). In the flow
visualization pictures the vortex on the windward side of the cylinder appears to be
more fuzzy and located at a smaller angle to the free-stream direction. This discrepancy
is perhaps because of the three-dimensionality of the flow and the wake starting to
become turbulent. The development of the closed streamlines around the cylinder, with
time, can be observed. Flows at Re = 200 past a cylinder with = 2:07 and 3:25 with