Stability of Butterfly's Flight

Thursday, June 6, 2013 - 10:30am - 11:30am
Keller 3-180
Naoto Yokoyama (Kyoto University)
The stability of the forward flight of a periodically-flapping butterfly is numerically investigated. The flight is longitudinally unstable owing to the flapping motion and the flow structures, and the control of the pitching angle is essential for stable periodic flights. The control is observed to be done by the abdominal motion, and the butterflies adopt a different approach to stabilize the flight from the human-made control systems. The control mechanism of butterfly's flapping flights will be discussed by comparing to the other control systems.

This is joint work with Kei Senda, Makoto Iima and Norio Hirai.