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home · events · colloquia · 2000-2001 · 

Colloquium - Wang

ECCR 245

Unsteady Aerodynamics of Insect Flight
Department of Theoretical and Applied Mechanics, Cornell University
Z. Jane Wang photo

The myth `bumble-bees can not fly according to conventional aerodynamics' simply reflects our poor understanding of unsteady viscous fluid dynamics. In particular, we lack a theory of vorticity shedding due to dynamic boundaries at the intermediate Reynolds numbers relevant to insect flight, typically between 102 and 104, where both viscous and inertial effects are important. In our study, we compute unsteady viscous flows, governed by the Navier-Stokes equation, about a two dimensional flapping wing which mimics the motion of an insect wing. I will present two main results: 1) the existence of a preferred frequency in forward flight and its physical origin, and 2) the vortex dynamics and unsteady forces in hovering dragonfly flight. If time permits, I will show the recent results on three dimensional flapping flight driven by muscles.

Hosted by Elizabeth Bradley.
This talk is being held jointly with the College Committee on Bioengineering and the Departments of Aerospace Engineering, Mechanical Engineering, and Applied Math.
Refreshments will be served immediately following the talk in ECOT 831.

The Department holds colloquia throughout the Fall and Spring semesters. These colloquia, open to the public, are typically held on Thursday afternoons, but sometimes occur at other times as well. If you would like to receive email notification of upcoming colloquia, subscribe to our Colloquia Mailing List. If you would like to schedule a colloquium, see Colloquium Scheduling.

Sign language interpreters are available upon request. Please contact Stephanie Morris at least five days prior to the colloquium.

See also:
Department of Computer Science
College of Engineering and Applied Science
University of Colorado Boulder
Boulder, CO 80309-0430 USA
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