Author(s)

T. Uemura, F. Yamamoto, M. Iguchi, Z. Morita, T. Usui & J. Ohta

Abstract

PTV measurement of a three-dimensional particle motion in a bubbling jet mixing water vessel T. Uemura," F. Yamamoto^ M. Iguchi/ Z. Morita/ T. Usui,' J. Ohta& ^Kansai University ^Department of Mechanical Engineering, Fukui University, 3-9-1 Bunkyo, Fukui-shi 910, Japan ^Faculty of Engineering Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560, Japan *Faculty of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565, Japan ABSTRACT The present paper proposes a new stereo pair matching technique with correction of light refraction at water-air boundary using two video pictures and a new particle tracking algorithm for three-dimensional particle-tracking velocimetry (3D PTV) based on a cross-correlation method using two- consecutive-time-step binary pictures. The technique of 3D PTV is applied to measure three-dimensional velocity vectors of tracer particle motion in a cylindrical water vessel with a bottom blowing bubbling jet. T

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