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Turbulence in High-Frequency Periodic Fully-Developed Pipe Flow

  • J.-L. Hwang
  • G. J. Brereton
Conference paper

Abstract

The effects of high frequency organized unsteadiness on wall-bounded turbulence have been studied experimentally at higher frequencies than have been achieved in previous investigations. A detailed examination was made of the contention that non-linear resonant interactions might be found if oscillation were induced at a frequency characteristic of turbulence in the parent boundary layer. It was found that the response of turbulence to forced unsteadiness around and above the burst frequency constituted a monotonic approach to a “frozen state.” No resonant behavior was detected. However, when the period of forced oscillation reached a timescale characteristic of the lifetime of a low-speed streak in the sublayer, the streaks underwent some spatial organization with a commensurate reduction in their spanwise meandering motion. This effect is a minor one and does not appear to be a precursor to any resonant behavior.

Keywords

Wall Shear Stress Streamwise Velocity Pipe Flow Forced Oscillation Parent Boundary Layer 
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 1993

Authors and Affiliations

  • J.-L. Hwang
    • 1
  • G. J. Brereton
    • 1
  1. 1.Department of Mechanical Engineering and Applied MechanicsThe University of MichiganAnn ArborUSA

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