TY - JOUR
T1 - Stereoscopic particle image velocimetry investigation of three-dimensional characteristics of vortex structure in a turbulent channel flow
AU - Li, Feng Chen
AU - Kawaguchi, Yasuo
AU - Segawa, Takehiko
AU - Hishida, Koichi
PY - 2005/3
Y1 - 2005/3
N2 - 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).
AB - 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).
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U2 - 10.1088/0256-307X/22/3/029
DO - 10.1088/0256-307X/22/3/029
M3 - Article
AN - SCOPUS:24144483413
SN - 0256-307X
VL - 22
SP - 624
EP - 627
JO - Chinese Physics Letters
JF - Chinese Physics Letters
IS - 3
ER -