Breaking waves on a dynamic Hele-Shaw beach


Bokhove, Onno and Horn, Bram van der and Meer, Devaraj van der and Zweers, Wout and Thornton, Anthony (2012) Breaking waves on a dynamic Hele-Shaw beach. [Report]

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Abstract:We report the formation of quasi-steady beaches and dunes via breaking waves in our tabletop ‘Hele-Shaw’ beach experiment. Breaking waves are generated by a wave maker, and zeolite particles act as sand. The tank is narrow, just over one-particle diameter wide, creating a quasi-2D set-up. Classical breaker types are observed on a time-scale of about a second. Beach formation under breakers occurs on a longer time-scale, and is a matter of minutes for a range of mono-chromatic wave frequencies. Alternating the wave maker motion between two frequencies generally leads to beach formation but occasionally to formation of a stable dune with water on either side. Finally, the Hele-Shaw configuration explored here experimentally lends itself to multi-scale modeling of beach dynamics.
Item Type:Report
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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