The dynamics of driven rotating flow in stadium-shaped domains

J. J. Kobine, T. Mullin, T. J. Price

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    Abstract

    Results are presented from an experimental investigation of the dynamics of driven rotating flows in stadium-shaped domains. The work was motivated by questions concerning the typicality of low-dimensional dynamical phenomena which are found in Taylor-Couette flow between rotating circular cylinders. In such a system, there is continuous azimuthal symmetry and travelling-wave solutions are found. In the present study, this symmetry is broken by replacing the stationary outer circular cylinder with one which has a stadium-shaped cross-section. Thus there is now only discrete symmetry in the azimuthal direction, and travelling waves are no longer observed. To begin with, the two-dimensional flow field was investigated using numerical techniques. This was followed by an experimental study of the dynamics of flow in systems with finite vertical extent. Configurations involving both right-circular and tapered inner cylinders were considered. Dynamics were observed which correspond to known mechanisms from the theory of finite-dimensional dynamical systems. However, how behaviour was also observed which cannot be classified in this way. Thus it is concluded that while certain low-dimensional dynamical phenomena do persist with breaking of the continuous azimuthal symmetry embodied in the Taylor-Couette system, sufficient reduction of symmetry admits behaviour at moderately low Reynolds number which is without any low-dimensional characteristics.

    Original languageEnglish
    Pages (from-to)47-69
    Number of pages23
    JournalJournal of Fluid Mechanics
    Volume294
    DOIs
    Publication statusPublished - Jul 1995

    Keywords

    • CHAOS
    • CONVECTION
    • ONSET
    • TIME
    • TURBULENCE
    • TRANSITION
    • TAYLOR-COUETTE FLOW
    • FLUID
    • CYLINDERS

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