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Physical Review Letters 105 (2010) 194301
The clapping book: Wind-driven oscillations in a stack of elastic sheets
Peter Buchak 1, Christophe Eloy 2, Pedro M. Reis 3
(05/11/2010)

We present a hybrid experimental and theoretical study on the oscillatory behavior exhibited by multiple thin sheets under aerodynamic loading. Our clapping book consists of a stack of paper, clamped at the downstream end and placed in a wind tunnel with steady flow. As pages lift off, they accumulate onto a bent stack held up by the wind. The book collapses shut once the elasticity and weight of the pages overcome the aerodynamic force; this process repeats periodically. We develop a theoretical model that predictively describes this periodic clapping process.
1 :  Department of mathematics
Massachusetts Institute of Technology
2 :  Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE)
CNRS : UMR6594 – Université de Provence - Aix-Marseille I – Université de la Méditerranée - Aix-Marseille II – Ecole Centrale de Marseille
3 :  Department of Mechanical Engineering (MIT-MECHE)
Massachussetts Institute of Technology (MIT)
Physique/Mécanique/Mécanique des fluides

Sciences de l'ingénieur/Mécanique/Mécanique des fluides
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