Scaling of second- and higher-order structure functions in turbulent boundary layers
CM de Silva, I Marusic, JD Woodcock, C Meneveau
Journal of Fluid Mechanics | CAMBRIDGE UNIV PRESS | Published : 2015
The statistical properties of wall turbulence in the logarithmic region are investigated using structure functions of the streamwise velocity. To this end, datasets that span several orders of magnitude of Reynolds numbers are used, up to Re = O(10 ), providing uniquely large scale separations for scrutinising previously proposed scaling laws. For the second-order structure functions strong support is found simultaneously for power-law scalings in the Kolmogorov inertial subrange and for logarithmic scaling at larger scales within the inertial range (z < r 蠐 δ, where z is the distance from the wall, r the scale, and δ the boundary layer thickness). The observed scalings are shown to agree b..View full abstract
Awarded by US National Science Foundation
Awarded by Office Of Internatl Science &Engineering
The authors gratefully acknowledge the financial support of the Australian Research Council. C.M. is grateful to the Australian-American Fulbright Commission Senior Scholar Fellowship program for support during initial stages of this work, and the US National Science Foundation (grants CBET 1133800 and IIA 124382) for subsequent support.