Self-similarity of wall-attached turbulence in boundary layers

Baars, W, Hutchins, N and Marusic, I 2017, 'Self-similarity of wall-attached turbulence in boundary layers', Journal of Fluid Mechanics, vol. 823, pp. 1-12.


Document type: Journal Article
Collection: Journal Articles

Title Self-similarity of wall-attached turbulence in boundary layers
Author(s) Baars, W
Hutchins, N
Marusic, I
Year 2017
Journal name Journal of Fluid Mechanics
Volume number 823
Start page 1
End page 12
Total pages 12
Publisher Cambridge University Press
Abstract An assessment of the turbulent boundary layer flow structure, which is coherent with the near-wall region, is carried out through a spectral coherence analysis. This spectral method is applied to datasets comprising synchronized two-point streamwise velocity signals at a near-wall reference position and a range of wall-normal positions spanning a Reynolds-number range . Within each dataset, a self-similar structure is identified from the coherence between the turbulence in the logarithmic region and at the near-wall reference position. This self-similarity is described by a streamwise/wall-normal aspect ratio of , where and are the streamwise wavelength and wall-normal distance respectively.
Subject Aerodynamics (excl. Hypersonic Aerodynamics)
Keyword(s) boundary layer structure
turbulent boundary layers
turbulent flows
DOI - identifier 10.1017/jfm.2017.357
Copyright notice © 2017 Cambridge University Press.
ISSN 0022-1120
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