Abstract.
In this paper four families of orthogonal wavelets are applied to analyze the turbulent counter gradient transport phenomena in fully developed asymmetric channel flows. The results show that: (1) In the instance of counter gradient transport, the principal scale of the coherent structure is responsible for the strong local counter gradient transport; (2) Counter gradient transport phenomena have a strong effect on the intermittency of turbulence; (3) Non-Gaussian part of the principal coherent structure is essential for counter gradient transport phenomena.
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The project supported by the National Natural Science Foundation of China (10272071, 10472063)
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Jiang, J., Qiu, X., Lu, Z. et al. Orthogonal wavelet analysis of counter gradient transport phenomena in turbulent asymmetric channel flow. ACTA MECH SINICA 21, 133–141 (2005). https://doi.org/10.1007/s10409-005-0023-0
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DOI: https://doi.org/10.1007/s10409-005-0023-0