Stereoscopic particle image velocimetry investigation of three-dimensional characteristics of vortex structure in a turbulent channel flow

Feng Chen Li, Yasuo Kawaguchi, Takehiko Segawa, Koichi Hishida

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigate the three-dimensional characteristics of turbulence structures in a turbulent channel flow by employing stereoscopic particle image velocimetry (SPIV). The SPIV measurement was performed for a water Sow at the Reynolds number Re = 1.1 × 104 in both the streamwise-spaawise (x-z) and spanwise-wall-normal (z-y) planes, respectively. A three-dimensional image of the vortex tubes or the hairpin vortex leg(s) inclined toward the wall was obtained. A series of wall-normal vortex cores were found to align with the low-speed streaks with opposite vorticity signals at both sides of the streaks in the x-z plane, which were cross-section slices of the inclined hairpin vortex leg(s).

Original languageEnglish
Pages (from-to)624-627
Number of pages4
JournalChinese Physics Letters
Volume22
Issue number3
DOIs
Publication statusPublished - 2005 Mar 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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