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Long-period oscillations in a harbour induced by incident short waves

Published online by Cambridge University Press:  26 April 2006

Chiang C. Mei  and
Yehuda Agnon
Chiang C. Mei
Affiliation:
Department of Civil Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
Yehuda Agnon
Affiliation:
Department of Civil Engineering, Technion, Haifa, Israel
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Abstract

Progressive short waves with a narrow frequency band are known to be accompanied by long set-down waves travelling with the groups. In finite depth, scattering of short waves by a large structure or a varying coastline can radiate free long waves which propagate faster than the incident set-down. In a partially enclosed harbour attacked by short waves through the entrance, such free long waves can further resonate the natural modes of the harbour basin. In this paper an asymptotic theory is presented for a harbour whose horizontal dimensions are much greater than the entrance width, which is in turn much wider than the short wavelength.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 208 , November 1989 , pp. 595 - 608
Copyright
© 1989 Cambridge University Press

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