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Localization of gravity waves on a channel with a random bottom

Published online by Cambridge University Press:  21 April 2006

Pierre Devillard ,
François Dunlop  and
Bernard Souillard
Pierre Devillard
Affiliation:
Centre de Physique Théorique, Ecole Polytechnique, F-91128 Palaiseau, France
François Dunlop
Affiliation:
Centre de Physique Théorique, Ecole Polytechnique, F-91128 Palaiseau, France
Bernard Souillard
Affiliation:
Centre de Physique Théorique, Ecole Polytechnique, F-91128 Palaiseau, France
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Abstract

We present a theoretical study of the localization phenomenon of gravity waves by a rough bottom in a one-dimensional channel. After recalling localization theory and applying it to the shallow-water case, we give the first study of the localization problem in the framework of the full potential theory; in particular we develop a renormalized-transfer-matrix approach to this problem. Our results also yield numerical estimates of the localization length, which we compare with the viscous dissipation length. This allows the prediction of which cases localization should be observable in and in which cases it could be hidden by dissipative mechanisms.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 186 , January 1988 , pp. 521 - 538
Copyright
© 1988 Cambridge University Press

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