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AN EXPERIMENTAL STUDY ON THE INTERACTION BETWEEN AN IMMISCIBLE DROPLET AND A LIQUID TAYLOR-VORTEX FLOW

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhen.130
page 7

Mitsuru Tanaka
Dept. of Mechanical and System Eng., Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Kyoto 606, Japan

Yoshimichi Hagiwara
Department of Mechanical and System Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan

T. None
Dept. of Mechanical and System Eng., Kyoto Institute of Technology, Matsugasaki, Kyoto 606, Japan

M. Nakamura
Dept. of Mechanical and System Eng., Kyoto Institute of Technology, Matsugasaki, Kyoto 606, Japan

Hidetoshi Hana
Dept. of Mechanical and System Eng., Kyoto Institute of Technology, Matsugasaki, Kyoto 606, Japan

Abstrakt

We have conducted measurement of the velocity field around an immiscible silicon-oil droplet of 6 mm in diameter carried by water Taylor-vortex flow in an annulus between a stationary cylinder of 80 mm in inner diameter and a rotating cylinder of 60 mm in outer diameter in order to understand the interaction between a droplet and a vortex. The time-varying velocity field has been visualised by tracer particles smaller than 0.3 mm in diameter. The velocity vectors of the particles have been obtained from visualised images by using a particle-tracking-velocimetry method. Experimental results show that the kinetic energy is attenuated due to the diminution of vortical flow. Attenuation of vorticity is found around the droplet except for a small region where the vortical flow impinges.

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