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Bifurcation phenomena in Taylor–Couette flow with buoyancy effects

Published online by Cambridge University Press:  21 April 2006

K. S. Ball
Affiliation:
Division of Applied Mathematics, Brown University, Providence, RI 02912, USA
B. Farouk
Affiliation:
Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USA

Abstract

A numerical study has been conducted to determine the various modes of Taylor–Couette flow that exist between concentric vertical cylinders, as the aspect ratio Γ (height to gap width, H/d) and the Reynolds number Re (based on the inner cylinder speed) are varied. Furthermore, the effects of the introduction of buoyancy on the development of the flow are examined. This is accomplished by considering both cylinders to be isothermal, with the rotating inner cylinder at a higher temperature than the stationary outer cylinder. Results are presented for a wide range of the Grashof number Gr (based on the temperature difference ΔT across the annular gap). The structure of the Taylor vortices is observed to be distorted considerably with the buoyant flows, and the nature of the onset and subsequent development of the vortices is altered. The hysteresis between the different modes of cellular flow, characteristic of the bifurcation phenomena, is also substantially modified.

Type
Research Article
Copyright
© 1988 Cambridge University Press

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