Statistical imprints of structure in wall turbulence

K. T. Christensen, Y. Wu, Ronald Adrian, W. Lai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Statistical imprints of both small- and large-scale structures in the outer layer of wall turbulence are studied using large ensembles of experimental data. Instantaneous velocity and acceleration fields have been measured over a broad Reynolds-number range (550 < Re τ < 2433) in the streamwise-wall-normal plane of fully-developed turbulent channel flow using particle-image velocimetry and particle-image accelerometry. Multi-point statistics of velocity and acceleration are computed from this data and average length scales are determined from the statistics. These average length scales are found to be consistent with the spatial extents of the vortical structures often observed in instantaneous velocity realizations of wall turbulence. In addition, these length scales exhibit clear trends with both wall-normal position and Reynolds number.

Original languageEnglish (US)
Title of host publicationAIAA Paper
Pages7068-7078
Number of pages11
StatePublished - 2004
Externally publishedYes
Event42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 5 2004Jan 8 2004

Other

Other42nd AIAA Aerospace Sciences Meeting and Exhibit
Country/TerritoryUnited States
CityReno, NV
Period1/5/041/8/04

ASJC Scopus subject areas

  • Engineering(all)

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