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Air flow over a flapping bird's wing at low Reynolds numbers : discussions in a teaching demonstration
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Williams, Hollis (2022) Air flow over a flapping bird's wing at low Reynolds numbers : discussions in a teaching demonstration. European Journal of Physics, 43 (5). 055801. doi:10.1088/1361-6404/ac78a8 ISSN 1361-6404.
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Official URL: https://doi.org/10.1088/1361-6404/ac78a8
Abstract
Bird wings are frequently modelled in the aerodynamics literature under the assumption that they are static aerofoils. Air flows over real bird wings can violate this assumption, both because of the topology of the wing and the fact that real wings typically undergo flapping and twisting motions during flight. There are many computational and numerical studies of air flows on flapping bird's wings at low Reynolds numbers, but relatively few experimental studies due to the difficulty of modelling a realistic flapping motion. In this article, the flow on a real flapping bird wing is visualised in a teaching demonstration using high-speed photography. It is found that the main features of the flow can be observed and that the demonstration is a teaching aid for assisting student understanding of principles of aerodynamics. The possibility of incorporating the demonstration into a standard teaching course is discussed, with relevant teaching objectives highlighted. In conclusion, it is recommended that the demonstration could be useful as part of a course on aerodynamics, with further follow-up demonstrations and studies suggested.
Item Type: | Journal Article | ||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Library of Congress Subject Headings (LCSH): | Aerodynamics, Fluid dynamics -- Mathematical models, Wings (Anatomy), Flight -- Mathematical models, Birds -- Flight, Ornithopters | ||||||
Journal or Publication Title: | European Journal of Physics | ||||||
Publisher: | IOP Publishing | ||||||
ISSN: | 1361-6404 | ||||||
Official Date: | 30 June 2022 | ||||||
Dates: |
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Volume: | 43 | ||||||
Number: | 5 | ||||||
Article Number: | 055801 | ||||||
DOI: | 10.1088/1361-6404/ac78a8 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 11 May 2022 | ||||||
Date of first compliant Open Access: | 8 July 2022 | ||||||
RIOXX Funder/Project Grant: |
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