Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session M19: Biological Fluid Dynamics: Flying Insects
8:00 AM–10:10 AM,
Tuesday, November 20, 2018
Georgia World Congress Center
Room: B306
Chair: Laura Miller, University of North Carolina at Chapel Hill
Abstract ID: BAPS.2018.DFD.M19.6
Abstract: M19.00006 : Time-Resolved Micro PIV Measurements around a Freely Flying Tiny Insect
9:05 AM–9:18 AM
Presenter:
David Murphy
(Univ of South Florida)
Authors:
David Murphy
(Univ of South Florida)
Ferhat Karakas
(Univ of South Florida)
Ali Al Dasouqi
(Univ of South Florida)
Kuvvat Garayev
(Univ of South Florida)
Hugh Smith
(Univ of Florida)
The aerodynamics of flapping flight by tiny, mm-scale insects is not well understood. These insects are thought to rely heavily on unsteady aerodynamic interactions between the wings such as the clap-and-fling maneuver to generate lift. One reason for this knowledge gap is the technical challenges arising from the minute time and length scales of tiny insects beating their wings at hundreds of Hz. Here we use a novel ultra-high speed brightfield micro PIV system to measure time-resolved (10 kHz) 2D flow fields generated by a freely flying sweetpotato whitefly (Bemisia tabaci). An orthogonally positioned and synchronized camera records wing and body kinematics and the position of the insect in the PIV camera’s measurement plane. The whitefly has wing and chord lengths of 1 mm and 0.38 mm, respectively, a wingtip speed of 0.7 m/s, a wingbeat frequency of 170 Hz, a chordwise Reynolds number of 26, and a flight speed of 70 mm/s. Flow fields show that, in the clap phase, a high speed jet of air with speeds reaching 0.5 m/s emanates downward from between the approaching wings. In the fling phase, air rushes down into the V-shaped gap between the wings and forms enhanced leading edge vortices. These flow features have not been previously measured in a freely flying tiny insect.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M19.6
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700