On the critical condition for wall turbulence generation

  • M. Nishioka
  • M. Asai
  • S. Furumoto
Part of the Acta Mechanica book series (ACTA MECH.SUPP., volume 4)


The critical flow condition for self-sustaining wall turbulence and the related minimum Reynolds number are examined on the basis of our previous and new experiments on the subcritical transition in channel and flat-plate flows to obtain a better understanding of the mechanism for wall turbulence generation. It is stressed that energetic hairpin eddies coming from upstream can trigger the subcritical disturbance growth, or their regeneration, in Blasius flow beyond R θ = 110 ~ 130. Downstream, the mean velocity can follow the logarithmic distribution beyond R θ = 210. We also find that the minimum Reynolds number R θ is not much different for the pipe, channel and flat-plate wall flows.


Secondary Instability Wall Turbulence Plane Poiseuille Flow Boundary Layer Plate Stagger Cylinder 
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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • M. Nishioka
    • 1
  • M. Asai
    • 2
  • S. Furumoto
    • 3
  1. 1.Department of Aerospace EngineeringUniversity of Osaka PrefectureSakai, Osaka 593Japan
  2. 2.Department of Aerospace EngineeringTokyo Metropolitan Institute of TechnologyHino, Tokyo 191Japan
  3. 3.Graduate SchoolUniversity of Osaka PrefectureSakai, Osaka 593Japan

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