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Title: Fluid dynamics of flapping insect wing in ground effect
Authors: Wu, J.
Shu, C. 
Zhao, N.
Yan, W.
Keywords: Drag reduction
Flapping insect wing
Ground effect
Lift enhancement
Issue Date: Jan-2014
Citation: Wu, J., Shu, C., Zhao, N., Yan, W. (2014-01). Fluid dynamics of flapping insect wing in ground effect. Journal of Bionic Engineering 11 (1) : 52-60. ScholarBank@NUS Repository.
Abstract: The fluid dynamics of flapping insect wing in ground effect is investigated numerically in this study. To model the insect wing cross-section in forward-flight mode, the laminar flow over a NACA0012 airfoil animated by a combination of harmonic plunge and pitch rotation is considered. To implement the simulation, the proposed immersed boundary-lattice Boltzmann method is employed. By fixing the Reynolds number and the amplitude of motion, we systematically examine the influences of the distance between the foil and the ground and the flapping frequency on the flow behaviors. As compared to the situation out of ground effect, the forces for foil placed in close proximity to the ground show some differences. The mean drag coefficient is increased at low frequency and decreased at high frequency. Meanwhile, the mean lift coefficient is increased at both low and high frequencies and decreased at middle frequency. Moreover, an interesting phenomenon with oblate vortices due to vortex interaction with the ground is observed. © 2014 Jilin University.
Source Title: Journal of Bionic Engineering
ISSN: 16726529
DOI: 10.1016/S1672-6529(14)60019-6
Appears in Collections:Staff Publications

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