Investigating the structure of turbulent boundary layers with a high spatial resolution stereoscopic digital PIV system

Chong Y. Wong, Sophie Herpin, Michel Stanislas, Julio Soria

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

Abstract

Results from velocity fields and a two-point spatial correlation analysis from data collected in a wide field-of-view Stereoscopic particle image velocimetry experiment in a turbulent boundary layer at Reθ= 2200 is reported here. The field-of-view of the correlation maps for u-u, v-v and w-w velocity components has a span of Δx=5.2δ and a height of Δy=0.75δ. The study finds that the velocity fields and additional spatial correlation contours provide some character of hairpin vortex packets discussed in the literature and provide some evidence of 'superlayers' and 'superstructures' originating from the buffer and logarithmic layer respectively. The study also provides some nominal relationship between the growth of these structures, their respective aspect ratios and the inclination angles of the structures (acute angle between a structure's major axis and the stream-wise axis) with wall normal distance from the tunnel floor for this particular flow-case.

Original languageEnglish
Title of host publication38th AIAA Fluid Dynamics Conference and Exhibit
Publication statusPublished - 1 Dec 2008
Event38th AIAA Fluid Dynamics Conference and Exhibit - Seattle, WA, United States of America
Duration: 23 Jun 200826 Jun 2008

Publication series

Name38th AIAA Fluid Dynamics Conference and Exhibit

Conference

Conference38th AIAA Fluid Dynamics Conference and Exhibit
CountryUnited States of America
CitySeattle, WA
Period23/06/0826/06/08

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