Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Experimental Investigation of Symmetrical Baroclinic Instability Between Two Concentric Rotating Spheres
M. Mahloul, A. Mahamdia, N. Merabet, E. Adnane
Abstract:
The symmetrical baroclinic instability flow between two concentric rotating spheres is investigated experimentally. The appearance and the size of this instability are examined by their dependence on a wide range of the Reynolds number (Re ≤ 1200) in one hand and on the aspect ratios Γ = H/d (14.4 ≤ Γ ≤ 18.5) mm in the other hand. The obtained results allow presenting the evolution of Reynolds and Richardson number according the aspect ratio. It was found that the size and diameter of the baroclinic vortex depend strongly on the aspect ratio and the rotation velocity.
Keywords:
concentric rotating spheres, symmetrical baroclinic instability, visualization

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2018.026

In Proceedings Topical Problems of Fluid Mechanics 2018, Prague, 2018 Edited by David Šimurda and Tomáš Bodnár, pp. 197-202 ISBN 978-80-87012-65-9 (Print) ISSN 2336-5781 (Print)