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The complex aerodynamic footprint of desert locusts revealed by large-volume tomographic particle image velocimetry.

Henningsson, Per LU ; Michaelis, Dirk; Nakata, Toshiyuki; Schanz, Daniel; Geisler, Reinhard; Schröder, Andreas and Bomphrey, Richard J (2015) In Journal of the Royal Society Interface 12(108).
Abstract
Particle image velocimetry has been the preferred experimental technique with which to study the aerodynamics of animal flight for over a decade. In that time, hardware has become more accessible and the software has progressed from the acquisition of planes through the flow field to the reconstruction of small volumetric measurements. Until now, it has not been possible to capture large volumes that incorporate the full wavelength of the aerodynamic track left behind during a complete wingbeat cycle. Here, we use a unique apparatus to acquire the first instantaneous wake volume of a flying animal's entire wingbeat. We confirm the presence of wake deformation behind desert locusts and quantify the effect of that deformation on estimates of... (More)
Particle image velocimetry has been the preferred experimental technique with which to study the aerodynamics of animal flight for over a decade. In that time, hardware has become more accessible and the software has progressed from the acquisition of planes through the flow field to the reconstruction of small volumetric measurements. Until now, it has not been possible to capture large volumes that incorporate the full wavelength of the aerodynamic track left behind during a complete wingbeat cycle. Here, we use a unique apparatus to acquire the first instantaneous wake volume of a flying animal's entire wingbeat. We confirm the presence of wake deformation behind desert locusts and quantify the effect of that deformation on estimates of aerodynamic force and the efficiency of lift generation. We present previously undescribed vortex wake phenomena, including entrainment around the wing-tip vortices of a set of secondary vortices borne of Kelvin-Helmholtz instability in the shear layer behind the flapping wings. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Royal Society Interface
volume
12
issue
108
publisher
Royal Society
external identifiers
  • pmid:26040598
  • wos:000358824600027
  • scopus:84936775058
ISSN
1742-5662
DOI
10.1098/rsif.2015.0119
language
English
LU publication?
yes
id
93e314c5-c13c-45fa-b77c-86df3ee70e07 (old id 7508364)
date added to LUP
2015-08-13 08:59:54
date last changed
2017-10-22 03:30:23
@article{93e314c5-c13c-45fa-b77c-86df3ee70e07,
  abstract     = {Particle image velocimetry has been the preferred experimental technique with which to study the aerodynamics of animal flight for over a decade. In that time, hardware has become more accessible and the software has progressed from the acquisition of planes through the flow field to the reconstruction of small volumetric measurements. Until now, it has not been possible to capture large volumes that incorporate the full wavelength of the aerodynamic track left behind during a complete wingbeat cycle. Here, we use a unique apparatus to acquire the first instantaneous wake volume of a flying animal's entire wingbeat. We confirm the presence of wake deformation behind desert locusts and quantify the effect of that deformation on estimates of aerodynamic force and the efficiency of lift generation. We present previously undescribed vortex wake phenomena, including entrainment around the wing-tip vortices of a set of secondary vortices borne of Kelvin-Helmholtz instability in the shear layer behind the flapping wings.},
  articleno    = {20150119},
  author       = {Henningsson, Per and Michaelis, Dirk and Nakata, Toshiyuki and Schanz, Daniel and Geisler, Reinhard and Schröder, Andreas and Bomphrey, Richard J},
  issn         = {1742-5662},
  language     = {eng},
  number       = {108},
  publisher    = {Royal Society},
  series       = {Journal of the Royal Society Interface},
  title        = {The complex aerodynamic footprint of desert locusts revealed by large-volume tomographic particle image velocimetry.},
  url          = {http://dx.doi.org/10.1098/rsif.2015.0119},
  volume       = {12},
  year         = {2015},
}