These Gifs' show a steady flow past a circular cylinder.
Reynold's no is 100.
This is Dr. Sanjay Mittal 's work, who is an assistant professor
in Aerospace Engineering at IIT Kanpur.
Graphics simulation done by Mukul Gupta, using 3D version of the Post Processor
These pictures show vortex shedding in a flow across a circular cylinder.
Vorticity Isosurface