A Note on Spatial Zero Crossings of Fluctuating Velocity Field in Wall Bounded Turbulent Flows

Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)

Abstract

Spatial zero-crossings of fluctuating velocity and shear stress fields are investigated in a turbulent channel flow, through direct numerical simulations. It is confirmed that the Liepmann and Taylor scales resulting from spatial zero crossings coincide more or less as in experimental time-series. A simple relationship is provided for the zero-crossing frequency of shear stress signals. It is further shown that the spanwise zero-crossings of the local wall normal velocity contributes up to 80% to the dissipation near the wall.

Keywords

Direct Numerical Simulation Spanwise Direction Streamwise Vortex Turbulent Channel Flow Direct Numerical Simulation Data 
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References

  1. 1.
    Kailasnath, P., Sreenivasan, K.R.: Zero crossings of velocity fluctuations in turbulent boundary layers. Phys. Fluids A5(11), 2879–2885 (1993)Google Scholar
  2. 2.
    Sreenivasan, K.R., Bershadskii, A.: Clustering properties in turbulent signals. J. Statistical Physics 125, 1145–1157 (2006)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.LEGIGrenoble, Cedex 9France

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