Experimental determination of zonal winds driven by tides.

Morize, C; Le Bars, M; Le Gal, P; Tilgner, A

Morize, C; Le Bars, M; Le Gal, P; Tilgner, A.

Afiliación

Morize C; Institut de Recherche sur les Phénomènes Hors Equilibre, UMR 6594, CNRS et Aix-Marseille Universités, 49 rue F. Joliot-Curie, Boîte Postale 146, 13384 Marseille Cedex 13, France.

Phys Rev Lett ; 104(21): 214501, 2010 May 28.

Article en En | MEDLINE | ID: mdl-20867105

RESUMEN

We describe a new phenomenon of zonal wind generation by tidal forcing. Following a recent theoretical and numerical analysis [A. Tilgner, Phys. Rev. Lett. 99, 194501 (2007)], we present the first experimental evidence that the nonlinear self-interaction of a tidally forced inertial mode can drive an intense axisymmetric flow in a rotating deformed sphere. Systematic measurements of zonal flows are carried out by an embarked system of particle image velocimetry, allowing the determination of general scaling laws. These results are fully relevant for zonal winds generation in planets and stars, and illustrate a generic mechanism of geostrophic flow generation by periodic forcing.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2010 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Estados Unidos

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