FLOW PAST A SQUARE CYLINDER    Re = 100

These Animated Gifs' show an unsteady flow past a square cylinder.
Reynold's no is 100.

This is Arun Kumar Saha 's work, who is a Ph.D. student in
Computational Fluid Dynamics Dept. of Mechanical Engg. in IIT Kanpur.

MAC method used for solving Navier - Strokes equation
Third Order Spatial Discretization for Convective Terms
Second Order Spatial Discretization for Diffusive Terms
Second Order Adam-Bashforth Temporal Discretization

Graphics simulation done by me, using OpenGL  Graphics  and  ImageMagick-4.08.

Pressure ( Shading)    and    Vorticity ( Contours )

Streamline

Vorticity