Response of a flexible filament in a flowing soap film subject to a forced vibration

Jia, Laibing and Xiao, Qing and Wu, Haijun and Wu, Yangeng and Yin, Xiezhen (2015) Response of a flexible filament in a flowing soap film subject to a forced vibration. Physics of Fluids, 27 (1). 017101. ISSN 1070-6631

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    Abstract

    The interactions between flexible plates and fluids are important physical phenomena. A flag in wind is one of the most simplified and classical models for studying the problem. In this paper, we investigated the response of a flag in flow with an externally forced vibration by using flexible filaments and soap film. Experiments show that for a filament that is either in oscillation or stationary, the external forced vibration leads to its oscillation. A synchronization phenomenon occurs in the experiments. A small perturbation leads to a large response of flapping amplitude in response. The insight provided here is helpful to the applications in the flow control, energy harvesting, and bionic propulsion areas.