Wake partita —Lian Gan, University of Durham

This raw video shows wake pattern behind an oscillating cylinder. The forcing amplitude keeps constant; the frequency linearly ramps down. It is part of a systematic study where ramping up and down at various rates. Compared to the fixed frequency cases, ramping results in wake mode transition, skipping and hysteresis.

https://downloads.sms.cam.ac.uk/2718159/2718172.mp4