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On the Evolution of Shear-Layer Structures in Near-Wall Turbulence

  • A. V. Johansson
  • P. H. Alfredsson
  • H. Eckelmann

Abstract

Lift-up of low-speed fluid from the viscous sublayer creates shear-layer structures in the buffer region, that have been shown to be dynamically important for the generation of turbulence in wall-bounded flows. The present experiments, carried out in the Göttingen oil channel, focus on the evolution of shear-layers, by means of two-probe measurements in the buffer region of turbulent channel flow. Various separations in the streamwise and normal directions were used to obtain data on the inclination angles and progation velocity of the shear-layer, as well as the coherence of the flow structure.

Keywords

Wall Shear Stress Inclination Angle Viscous Sublayer Turbulent Channel Flow Conditional Average 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • A. V. Johansson
    • 1
  • P. H. Alfredsson
    • 1
  • H. Eckelmann
    • 2
  1. 1.Department of MechanicsThe Royal Institute of TechnologyStockholmSweden
  2. 2.Max-Planck Institut für StrömungsforschungGöttingenFed. Rep. of Germany

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