Oscillation and levitation of balls in continuously stratified fluids

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dc.creatorBiro, I.
dc.creatorGyure, B.
dc.creatorJanosi, I. M.
dc.creatorSzabo, K. G.
dc.creatorTel, T.
dc.date2007-02-23
dc.date.accessioned2026-07-07T09:41:39Z
dc.date.available2026-07-07T09:41:39Z
dc.descriptionThe free motion of balls is investigated experimentally in continously stratified fluid in a finite container. The oscillation frequency is found to be very close to the local Brunt-Vaisala frequency. The effect of added mass proves to be practically negligible. The evolution of rear jets is demonstrated, and a kind of long term levitation is found. We show that the classical viscous drag would lead to a much stronger damping than observed in the experiment. This is interpreted as a consequence of the feedback from the previously excited internal waves following their reflection from the boundaries. A phenomenological equation with a modified drag term is proposed to obtain a qualitative agreement with the observations. We point out that the inclusion of a history term would lead further away from the observed data.
dc.identifierhttps://arxiv.org/abs/physics/0702208
dc.identifierhttp://arxiv.org/abs/physics/0702208
dc.identifierPhysics of Fluids, Vol. 20, 051705 (2008).
dc.identifierdoi:10.1063/1.2927461
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161906
dc.subjectFluid Dynamics
dc.titleOscillation and levitation of balls in continuously stratified fluids
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