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Please use this identifier to cite or link to this item: http://hdl.handle.net/1813/11492
Title: The Wonderful skill of Pieris rapae crucivora climbing flight
Other Titles: The special skill of Pieris rapae crucivora climbing flight
Authors: Yang, J. T.
Lee, C. Y.
Lee, B. H.
Soong, C. Y.
Keywords: free flight
DPIV
Issue Date: 10-Oct-2008
Abstract: In this work, we conduct a free-flight test to explore the climbing motion of a butterfly species (Pieris rapae crucivora) and find its excellent flapping skills in this maneuver. In regular flight, the downstroke of wing flapping generates most of the required lift force, while the upstroke results in less or negative lift. To produce continuous lift, however, the butterfly alters its attitude from supination to pronation in upstroke mode and turns it into a lift-generating stroke. The wingbeat kinematics and the associated flow field are visualized using a digital particle image velocimetry (DPIV) system. With the movie and the measured flow data, the velocity vector and the corresponding vorticity field near the flapping wing are analyzed in-depth. These results demonstrate an effective use of various vortical wakes and manifest the sophisticated wingbeat kinematics as well as lift-generating mechanisms in the climbing flight of the Pieris rapae crucivora.
Description: We add one author and modify original title.
URI: http://hdl.handle.net/1813/11492
Appears in Collections:Fluid Dynamics Videos

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The Wonderful skill of Pieris rapae crucivora climbing flight (mpeg1).mpg15.97 MBMPEGView/Open
The Wonderful skill of Pieris rapae crucivora climbing flight (mpeg2).mpg91.75 MBMPEGView/Open

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