Journal
ANNUAL REVIEW OF FLUID MECHANICS, VOL 43
Volume 43, Issue -, Pages 353-375Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev-fluid-122109-160753
Keywords
boundary layers; channel flow; pipe flow; coherent motions; turbulence structure
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We review wall-bounded turbulent flows, particularly high-Reynolds number, zero-pressure gradient boundary layers, and fully developed pipe and channel flows. It is apparent that the approach to an asymptotically high- Reynolds number state is slow, but at a sufficiently high Reynolds number the log law remains a fundamental part of the mean flow description. With regard to the coherent motions, very-large-scale motions or superstructures exist at all Reynolds numbers, but they become increasingly important with Reynolds number in terms of their energy content and their interaction with the smaller scales near the wall. There is accumulating evidence that certain features are flow specific, such as the constants in the log law and the behavior of the very-large-scales and their interaction with the large scales (consisting of vortex packets). Moreover, the refilled attached-eddy hypothesis continues to provide an important theoretical framework for the structure of wall-bounded turbulent flows.
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