On The Mechanism Of Attenuation Of Turbulenci by Spanwise Wall Oscillation

  • Y. Miyake
  • K. Tsujimoto
  • M. Takahashi
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 5)


In this work, the mechanism of reduction of wall shear stress caused by spanwise oscillation of a wall is discussed by means of a DNS of a channel flow. For the case of wall oscillation where about 35% reduction in shear stress is attained, the detailed attenuation process of turbulence is discussed. It is demonstrated that the fall of production rate of quasi-streamwise vorticity due to stretching effect is substantial for the phenomenon. The periodical fluctuation of the attitude angle, i.e., the inclination angle to the wall and the slant angle of a vortex to the mean flow, enhances the production. This mechanism is a straightforward extension of the one commonly found in the usual near wall turbulence.


Wall Shear Stress Direct Numerical Simulation Vortex Line Streamwise Vortex Stationary Wall 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • Y. Miyake
    • 1
  • K. Tsujimoto
    • 1
  • M. Takahashi
    • 2
  1. 1.Dept. of Mech. Eng.Osaka UniversitySuita, OsakaJapan
  2. 2.Toshiba Electronic Co.Tsurumi-ku, YokohamaJapan

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