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Journal of Fluid Mechanics Journal of Fluid Mechanics

Article contents

Three-dimensional tidal sand waves

Published online by Cambridge University Press:  10 January 2009

PAOLO BLONDEAUX  and
GIOVANNA VITTORI
PAOLO BLONDEAUX
Affiliation:
Department of Civil, Environmental and Architectural Engineering – University of Genoa, Via Montallegro 1, 16145 Genova, Italy
GIOVANNA VITTORI
Affiliation:
Department of Civil, Environmental and Architectural Engineering – University of Genoa, Via Montallegro 1, 16145 Genova, Italy
Corresponding
E-mail address:
bix@dicat.unige.it
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Abstract

The process which leads to the formation of three-dimensional sand waves is investigated by means of a stability analysis which considers the time development of a small-amplitude bottom perturbation of a shallow tidal sea. The weakly nonlinear interaction of a triad of resonant harmonic components of the bottom perturbation is considered. The results show that the investigated resonance mechanism can trigger the formation of a three-dimensional bottom pattern similar to that observed in the field.

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Journal of Fluid Mechanics , Volume 618 , 10 January 2009 , pp. 1 - 11
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Copyright © Cambridge University Press 2008

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