Measurements of small radius ratio turbulent Taylor-Couette flow

ORAL

Abstract

In Taylor-Couette flows, the radius ratio ($\eta = r_i/r_o$) is one of the key parameters of the system. For small $\eta$, the asymmetry of the inner and outer boundary layer becomes more important, affecting the general flow structure and boundary layer characteristics. Using high-resolution particle image velocimetry we measure flow profiles, local transport, and statistical properties of the flow for a radius ratio of 0.5 and a Reynolds number of up to $4\cdot10^4$. By measuring flow profiles at varying heights, roll structures are characterized for two different rotation ratios of the inner and outer cylinder. In addition, we systematically vary the rotation ratio and the Reynolds number. These results exemplify how curvature affects flow in strongly turbulent Taylor-Couette Flow.

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Authors

  • Roeland van der Veen

    University of Twente

  • Sander Huisman

    University of Twente

  • Sebastian Merbold

    Brandenburg University of Technology

  • Chao Sun

    University of Twente, Physics of Fluids Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands, Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands

  • Uwe Harlander

    Brandenburg University of Technology

  • Christoph Egbers

    Brandenburg University of Technology

  • Detlef Lohse

    University of Twente, Physics of Fluids Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands, PoF Univ. of Twente, Physics of Fluids, Mesa+ Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands, Physics of Fluids, University of Twente, Univ of Twente