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Article Dans Une Revue Physics of Fluids Année : 2010

Tilt-over mode in a precessing triaxial ellipsoid

Résumé

The tilt-over mode in a precessing triaxial ellipsoid is studied theoretically and numerically. Inviscid and viscous analytical models previously developed for the spheroidal geometry by Poincaré [Bull. Astr. 27, 321 (1910)] and Busse [J. Fluid Mech., 33, 739 (1968)] are extended to this more complex geometry, which corresponds to a tidally deformed spinning astrophysical body. As confirmed by three-dimensional numerical simulations, the proposed analytical model provides an accurate description of the stationary flow in an arbitrary triaxial ellipsoid, until the appearance at more vigorous forcing of time dependent flows driven by tidal and/or precessional instabilities.
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Dates et versions

hal-00542552 , version 1 (22-04-2011)

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David Cébron, Michael Le Bars, Patrice Meunier. Tilt-over mode in a precessing triaxial ellipsoid. Physics of Fluids, 2010, 22 (11), pp.116601. ⟨10.1063/1.3504356⟩. ⟨hal-00542552⟩
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