General Information
    • ISSN: 2010-0221
    • Frequency: Bimonthly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Dr. Eldin W. C. Lim
    • Executive Editor: Mr. Ron C. Wu
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Editor-in-chief
Dr. Eldin W. C. Lim
Dept. of Chemical and Biomolecular Engineering,
National University of Singapore, Singapore
IJCEA 2017 Vol.8(4): 253-260 ISSN: 2010-0221
doi: 10.18178/ijcea.2017.8.4.666

Generation and Transport of Solid Particle Clusters Using a Vortex Ring Launched into Water

Tomomi Uchiyama, Chiaki Yano, and Tomohiro Degawa
Abstract—A vortex ring launched into quiescent water is used to generate and transport solid particle clusters. A vortex ring launcher, comprising a cylinder and piston, is mounted at the bottom of a water tank. One-hundred spherical, polyacetal particles (mean diameter: 1.52 mm, density: 1417 kg/m3) are placed on a mesh stretched near the cylinder outlet. The piston is used to discharge water in the cylinder vertically upward into the tank; this launches a particle-laden vortex ring. This solid-liquid two-phase flow is investigated at the Reynolds number Re, defined by the piston velocity and the cylinder diameter, of 6500, 7500, and 13000. When Re=6500, the particles are not entrained in the vortex ring, and therefore a cluster is not produced. Particles are entrained just after the launch of vortex rings at Re=7500 and 13000. These particle clusters are transported by the convection of the vortex ring. The velocity of water in the central vertical cross-section of the vortex ring decreases because of the particles, resulting in decreased circulation of the vortex ring. This reduction is more severe for lower Re.

Index Terms—Solid-liquid, two-phase flow, vortex ring, particle entrainment, Piv.

T. Uchiyama is with Nagoya University, Japan (e-mail: uchiyama@is.nagoya-u.ac.jp).
C. Yano is with Kawasaki Heavy Industries, Japan.
T. Degawa is with Nagoya University, Japan.

[PDF]

Cite: Tomomi Uchiyama, Chiaki Yano, and Tomohiro Degawa, "Generation and Transport of Solid Particle Clusters Using a Vortex Ring Launched into Water," International Journal of Chemical Engineering and Applications vol. 8, no. 4, pp. 253-260, 2017.

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