Experiments in Fluids

, Volume 50, Issue 1, pp 23–34 | Cite as

Vortical structures on a flapping wing

  • C. A. Ozen
  • D. Rockwell
Research Article


A wing in the form of a rectangular flat plate is subjected to periodic flapping motion. Space–time imaging provides quantitative representations of the flow structure along the wing. Regions of spanwise flow exist along the wing surface; and depending on the location along the span, the flow is either toward or away from the tip of the wing. Onset and development of large-scale, streamwise-oriented vortical structures occur at locations inboard of the tip of the wing, and they can attain values of circulation of the order of one-half the circulation of the tip vortex. Time-shifted images indicate that these streamwise vortical structures persist over a major share of the wing chord. Space–time volume constructions define the form and duration of these structures, relative to the tip vortex.


Vortex Vorticity Particle Image Velocimetry Vortical Structure Lead Edge Vortex 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Department of Mechanical Engineering and Mechanics, Lehigh UniversityBethlehemUSA

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