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.M19.4
Abstract: M19.00004 : The Role of Coupled Wing-Body Dynamics on Power Consumption in Butterflies*
8:39 AM–8:52 AM
Presenter:
Madhu Sridhar
(Univ of Alabama - Huntsville)
Authors:
Madhu Sridhar
(Univ of Alabama - Huntsville)
Chang-kwon Kang
(Univ of Alabama - Huntsville)
David Landrum
(Univ of Alabama - Huntsville)
Shannon Mathis
(Univ of Alabama - Huntsville)
The annual migration of Monarch butterflies spans over 4000 km. However, the aerodynamic efficiency behind their long-range flight is inadequately understood. To investigate the power consumption associated with the flight of Monarch butterflies, 69 flight segments from 9 butterfly specimens are analyzed. In particular, the coupled wing-body motion and the role of body undulation are analytically modeled and compared to the experimental measurements. The butterfly body is considered as a single mass system and the aerodynamic lift is calculated with a quasi-steady formulation. The two-way coupled dynamic model yields the body undulation amplitude and phase offset which agree well with the experimental measurements. A statistically significant decrease in the mean power coefficient is observed for the coupled wing-body system compared to the decoupled system, which suggests that body undulation reduces power consumption. The estimated energy savings from the coupled wing-body motion could extend the migration flight time by an average of 1.5 hours. This resultant reduction in power predicted with the coupled wing-body model suggests the potential benefits of bioinspired development of long-range micro robotic flyers.
*This work is partly supported by CBET-1335572 and CMMI-1761618
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M19.4
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