Tangential oscillations of a disk in a stratified fluid

Abstract : We present an experimental study of the generation of internal waves by the horizontal oscillations of a disk in a stratified fluid. Viscosity is the motor of the generation mechanism through the no-slip condition at the surface of the disk. Velocity fields are measured by particle image velocimetry and show that the waves form steady cross-shaped wave beams. Comparison with the theory of Davis & Llewellyn Smith (J. Fluid. Mech. 2010) exhibits good prediction of the wave profile but also a surprising underestimation of the wave amplitude at small amplitude of oscillation.
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Contributor : Bruno Voisin <>
Submitted on : Tuesday, April 5, 2011 - 4:07:26 PM
Last modification on : Thursday, January 3, 2019 - 4:30:09 PM

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  • HAL Id : hal-00583424, version 1

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Sylvain Joubaud, Bruno Voisin, Thierry Dauxois. Tangential oscillations of a disk in a stratified fluid. Geophysical and Astrophysical Internal Waves Conference, Feb 2011, Les Houches, France. ⟨hal-00583424⟩

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