Statistics of velocity fluctuations in turbulent Couette-Taylor flow

ORAL

Abstract

Azimuthal and axial velocity fluctuations between concentric cylinders were measured using Laser Doppler Anemometry in a turbulent Taylor-Couette apparatus. We measured the velocity fluctuations in the middle of the gap and near the outer wall, for pure inner cylinder and counter-rotating cylinders at a fixed Reynolds number of $2 \times 10^6$. The velocity structure functions calculated using extended self-similarity exhibit clear power-law scaling. The transverse and longitude structure function exponents have been compared in two measurement positions.

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Authors

  • Chao Sun

    The University of Twente, University of Twente, Physics of Fluids group, University of Twente, University of Twente, The Netherlands, Physics of Fluids Group, University of Twente

  • Sander Huisman

    Physics of Fluids group, University of Twente

  • Dennis van Gils

    Physics of Fluids group, University of Twente

  • Detlef Lohse

    The University of Twente, University of Twente, Physics of Fluids group, University of Twente, Physics of Fluids, Twente University, The Netherlands, University of Twente, The Netherlands, Physics of Fluids, University of Twente, Physics of Fluids Group, University of Twente