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Paper waves in the wind

By Pan Jia, Bruno Andreotti and Philippe Claudin


International audienceA flexible sheet clamped at both ends and submitted to a permanent wind is unstable and propagates waves. Here, we experimentally study the selection of frequency and wavenumber as a function of the wind velocity. These quantities obey simple scaling laws, which are analytically derived from a linear stability analysis of the problem and which also involve a gravity-induced velocity scale. This approach al- lows us to collapse data obtained with sheets whose flexible rigidity is varied by two orders of magnitude. This principle may be applied in the future for energy harvesting

Topics: [ PHYS.COND.CM-SCM ] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
Publisher: American Institute of Physics
Year: 2015
OAI identifier: oai:HAL:hal-01212692v1
Provided by: Hal-Diderot
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