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 Investigations of the Spherical Taylor-Couette Flow Using Electrodiffusion Technique
M. Mahloul, A. Mahamdia, M. Kristiawan
Abstract:
In this paper, we study the hydrodynamic instabilities between two concentric spheres, the inner rotating while the outer is at rest, through visualization and electrodiffusion technique. The exploration of the flow regimes is carried out for different values of the Taylor number Ta and the aspect ratio Γ, but with one dimensionless gap width δ = 0.107. The bifurcation diagram of the flow is determined by classical visualization. On the other hand, by means of electrodiffusion technique, we measured the friction factor at the inner wall of the outer sphere. Time series obtained by the electrodiffusion technique, using FFT, permitted the identification of the fundamental frequencies and confirmed part of the bifurcation diagram obtained by the classical visualization.
Keywords:
Spherical Taylor-Couette, visualisation, electrodiffusion, instability

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2017.028

In Proceedings Topical Problems of Fluid Mechanics 2017, Prague, 2017 Edited by David Šimurda and Tomáš Bodnár, pp. 221-228 ISBN 978-80-87012-61-1 (Print) ISSN 2336-5781 (Print)