FM24S_11488:Thu:1505:327
XXI International Congress of Theoretical and Applied Mechanics
Warsaw, Poland, August 15-21, 2004

Orthonormal Wavelet Analysis of CGT in Fully Developed Asymmetric Turbulent Channel Flow

Yu - Lu Liu, Jian - Bo Jiang, Xiang Qiu
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai, China


Orthonormal wavelet analyses are applied to the counter gradient transport (abbr. CGT) phenomena in the asymmetric fully developed turbulent channel flow. The main emphases are on the statistical characteristics of fluctuating velocity in the CGT region. The major results are the local counter-gradient transport phenomena happen on the various scales, thus it may be concluded that they are universal phenomena in turbulent flow; the global CGT phenomena are in close relation with the principal coherent scale.



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