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

An Experimental Study of the Laminar-Turbulent Transition in a Tilted Taylor-Couette System Subject to Free Surface Effect
Adnane E., Lalaoua A., Bouabdallah A.
Abstract:
An experimental study of the laminar – turbulent transition between two coaxial rotating cylinders with the inner cylinder rotates and outer one stationary is presented in this paper. Special attention is given to the onset of various flow modes in tilted and partially filled system. The flow behaviour, the laminar turbulent transition and the features of different regimes are discussed for different inclination angles, filling ratio and Taylor numbers. It is established that the different filling ratio and the inclination angle of the system deeply a ffect the flow patterns. Furthermore, the most significant result concerns the relaminarization of the flow when the aspect ratio is decreased and inclination angle is increased for a given value of Taylor number.
Keywords:
laminar turbulent transition, free surface, tilted system, relaminarization phenomenon, Taylor-Couette flow

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In Proceedings Topical Problems of Fluid Mechanics 2015, Prague, 2015 Edited by David Šimurda and Tomáš Bodnár, pp. 1-10 ISBN 978-80-87012-55-0 (Print) ISSN 2336-5781 (Print)