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3D vortex formation of rigid and flexible plates in impulsively starting motion

Kim, Daegyoum and Gharib, Morteza (2008) 3D vortex formation of rigid and flexible plates in impulsively starting motion. . (Unpublished)

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This fluid dynamics video shows three-dimensional vortex formation process for plates in impulsive motion which is investigated experimentally by using defocusing digital particle image velocimetry (DDPIV). Rigid and flexible plate cases are compared in order to study the effect of flexibility on 3D vortex formation and associated hydrodynamic forces. This study was motivated by the general question of how the flexibility of flapping propulsors in flying and swimming animals affects vortex formation and propulsive force. For translating and rotating motion, the flexible plate generates a vortex morphology which is drastically different from that of the rigid plate. We identified the deflection of the tip region as the source of this difference. The flexible plate does not produce a large peak for the hydrodynamic force at the impulsive start and stop. This force trend is correlated with smooth vortex formation and shedding processes.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper
Gharib, Morteza0000-0002-2204-9302
Record Number:CaltechAUTHORS:20200127-092211377
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100934
Deposited By: Tony Diaz
Deposited On:28 Jan 2020 19:42
Last Modified:28 Jan 2020 19:42

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