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Solitary waves perturbed by a broad sill. Part 1. Propagation across the sill

Published online by Cambridge University Press:  18 October 2019

Harrison T.-S. Ko  and
Harry Yeh Open the ORCID record for Harry Yeh [Opens in a new window]
Harrison T.-S. Ko
Affiliation:
Department of Civil and Construction Engineering, Oregon State University, Corvallis, OR 97331, USA
Harry Yeh*
Affiliation:
Department of Civil and Construction Engineering, Oregon State University, Corvallis, OR 97331, USA
*
†Email address for correspondence: [email protected]
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Abstract

Stability of a solitary wave disturbed by a submerged flat sill is investigated experimentally. For sills narrow compared with the solitary wave, the transmitted waves are found to be unaffected in waveform and amplitude. A wider sill disturbs the solitary wave resulting in the formation of a dispersive wavetrain following the transmitted wave. In some cases, the wave amplitude recovers, despite being perturbed, to the state of an unobstructed solitary-wave state at a certain distance beyond the sill. Wider sills cause wave breaking that occurs over the sill or, in some cases, after the wave passes through the sill. Details of waveform transformation leading toward the breaking and subsequent energy dissipation are discussed.

JFM classification

Waves/Free-surface Flows: Wave breaking Waves/Free-surface Flows: Solitary waves Waves/Free-surface Flows: Surface gravity waves
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 880 , 10 December 2019 , pp. 916 - 934
Copyright
© 2019 Cambridge University Press 

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