Three-Dimensional Particle Tracking Velocimetry With Laser-Light Sheet Scannings

[+] Author and Article Information
Satoru Ushijima, Nobukazu Tanaka

Central Research Institute of Electric Power Industry (CRIEPI), 1646 Abiko, Abiko-shi, Chiba-ken, 270-11, Japan

J. Fluids Eng 118(2), 352-357 (Jun 01, 1996) (6 pages) doi:10.1115/1.2817385 History: Received August 05, 1994; Revised April 12, 1995; Online December 04, 2007


This paper describes three-dimensional particle tracking velocimetry (3D PTV), which enables us to obtain remarkably larger number of velocity vectors than previous techniques. Instead of the usual stereoscopic image recordings, the present 3D PTV visualizes an entire three-dimensional flow with the scanning laser-light sheets generated from a pair of optical scanners and the images are taken by a high-speed video system synchronized with the scannings. The digital image analyses to derive velocity components are based on the numerical procedure (Ushijima and Tanaka, 1994), in which several improvements have been made on the extraction of particle images, the determination of their positions, the derivation of velocity components and others. The present 3D PTV was applied to the rotating fluids, accompanied by Ekman boundary layers, and their complicated secondary flow patterns, as well as the primary circulations, are quantitatively captured.

Copyright © 1996 by The American Society of Mechanical Engineers
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