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Vortex wakes generated by robins Erithacus rubecula during free flight in a wind tunnel

Hedenström, Anders LU ; Rosén, Mikael LU and Spedding, G R (2006) In Journal of the Royal Society Interface 3(7). p.263-276
Abstract
The wakes of two individual robins were measured in digital particle image velocimetry (DPIV) experiments conducted in the Lund wind tunnel. Wake measurements were compared with each other, and with previous studies in the same facility. There was no significant individual variation in any of the measured quantities. Qualitatively, the wake structure and its gradual variation with flight speed were exactly as previously measured for the thrush nightingale. A procedure that accounts for the disparate sources of circulation spread over the complex wake structure nevertheless can account for the vertical momentum flux required to support the weight, and an example calculation is given for estimating drag from the components of horizontal... (More)
The wakes of two individual robins were measured in digital particle image velocimetry (DPIV) experiments conducted in the Lund wind tunnel. Wake measurements were compared with each other, and with previous studies in the same facility. There was no significant individual variation in any of the measured quantities. Qualitatively, the wake structure and its gradual variation with flight speed were exactly as previously measured for the thrush nightingale. A procedure that accounts for the disparate sources of circulation spread over the complex wake structure nevertheless can account for the vertical momentum flux required to support the weight, and an example calculation is given for estimating drag from the components of horizontal momentum flux (whose net value is zero). The measured circulations of the largest structures in the wake can be predicted quite well by simple models, and expressions are given to predict these and other measurable quantities in future bird flight experiments. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Royal Society Interface
volume
3
issue
7
pages
263 - 276
publisher
The Royal Society of Canada
external identifiers
  • wos:000238367900005
  • pmid:16849236
  • scopus:33645805480
ISSN
1742-5662
DOI
10.1098/rsif.2005.0091
language
English
LU publication?
yes
id
b15db8a0-2b56-4af6-bcf1-b38270e27e0f (old id 159666)
date added to LUP
2016-04-01 11:57:40
date last changed
2021-06-30 04:18:52
@article{b15db8a0-2b56-4af6-bcf1-b38270e27e0f,
  abstract     = {The wakes of two individual robins were measured in digital particle image velocimetry (DPIV) experiments conducted in the Lund wind tunnel. Wake measurements were compared with each other, and with previous studies in the same facility. There was no significant individual variation in any of the measured quantities. Qualitatively, the wake structure and its gradual variation with flight speed were exactly as previously measured for the thrush nightingale. A procedure that accounts for the disparate sources of circulation spread over the complex wake structure nevertheless can account for the vertical momentum flux required to support the weight, and an example calculation is given for estimating drag from the components of horizontal momentum flux (whose net value is zero). The measured circulations of the largest structures in the wake can be predicted quite well by simple models, and expressions are given to predict these and other measurable quantities in future bird flight experiments.},
  author       = {Hedenström, Anders and Rosén, Mikael and Spedding, G R},
  issn         = {1742-5662},
  language     = {eng},
  number       = {7},
  pages        = {263--276},
  publisher    = {The Royal Society of Canada},
  series       = {Journal of the Royal Society Interface},
  title        = {Vortex wakes generated by robins Erithacus rubecula during free flight in a wind tunnel},
  url          = {http://dx.doi.org/10.1098/rsif.2005.0091},
  doi          = {10.1098/rsif.2005.0091},
  volume       = {3},
  year         = {2006},
}