Estimated Motion in a Cylinder Wake, Re=3900

This video displayed the vorticity of estimated fluid motion obtained by wavelet-based optic flow, at full resolution.
The input sequence consists in 3072 experimental PIV images of 1024x1024 pixel representing the classical case of cylinder wake at Reynolds=3900.
Kelvin-Helmholtz and von Karman instabilities are visible.
More information on http://www.irisa.fr/fluminance/team/Pierre.Derian.html