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Mass transport under standing waves over a sloping beach

Published online by Cambridge University Press:  14 May 2012

Pietro Scandura ,
Enrico Foti  and
Carla Faraci
Pietro Scandura*
Affiliation:
Department of Civil and Environmental Engineering, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
Enrico Foti
Affiliation:
Department of Civil and Environmental Engineering, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
Carla Faraci
Affiliation:
Department of Civil and Environmental Engineering, University of Messina, C.da Di Dio (S. Agata), 98166 Messina, Italy
*
†Email address for correspondence: [email protected]
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Abstract

This paper deals with the mass transport induced by sea waves propagating over a sloping beach and fully reflected from a wall. It is shown that for moderate slopes the classical recirculation cell structure holds for small Reynolds numbers only. When the Reynolds number is large, the cells interact among themselves giving rise to the merging of the negative cells and the confinement of the positive ones near the bottom. Under such circumstances the fluid moves onshore near the bottom and offshore near the free surface. The seaward decrease of the vorticity produced at the bottom appears to be the reason for the merging phenomenon.

JFM classification

Boundary Layers: Boundary Layers Geophysical and Geological Flows: Coastal engineering Waves/Free-surface Flows: Surface gravity waves
Type
Papers
Information
Journal of Fluid Mechanics , Volume 701 , 25 June 2012 , pp. 460 - 472
Copyright
Copyright © Cambridge University Press 2012

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