Vortex erosion in a shallow-water model

Type Article
Date 2004-08
Language English
Author(s) Louazel Stephanie, Hua Bach-Lien
Affiliation(s) EPSHOM, Ctr Mil Oceanog, F-29609 Brest, France.
IFREMER, Lab Phys Oceans, F-29280 Plouzane, France.
Source PHYSICS-OF-FLUIDS (1070-6631) (American Institute of Physics), 2004-08 , Vol. 16 , N. 8 , P. 3079-3085
DOI 10.1063/1.1767543
WOS© Times Cited 3
Keyword(s) Numerical model, Filamentation, Vorticity, Eddies
Abstract The purpose of this paper is to study the erosion of eddies by filamentation in a shallow-water model where both fast and slow components of the dynamics coexist. In presence of inertia-gravity waves this filamentation process is indeed found to be altered. However, the information required to analyze the filamentation process is shown to be entirely captured by the slow component of the flow and regions of filament ejection can be identified from a diagnostic criterion based on instantaneous slow quantities. This is illustrated numerically in a reduced gravity model for an initial elliptic vortex of distributed potential vorticity in presence of Poincare waves. (C) 2004 American Institute of Physics.
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