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.
- flexible filament
- rotating flows
- land transportation
Jia, L., Xiao, Q., Wu, H., Wu, Y., & Yin , X. (2015). Response of a flexible filament in a flowing soap film subject to a forced vibration. Physics of Fluids, 27(1), . https://doi.org/10.1063/1.4906799