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Numerical Simulation of Entrainment and Transport of Gas Bubbles by Vortex Ring

[+] Author Affiliations
Tomomi Uchiyama

Nagoya University, Nagoya, Japan

Yutaro Yoshii

Software Cradle Co., Ltd., Osaka, Japan

Paper No. AJK2011-21014, pp. 3769-3776; 8 pages
doi:10.1115/AJK2011-21014
From:
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by JSME

abstract

The possibility to control the motion of small gas bubbles by a vortex ring is explored through a numerical simulation. Hydrogen bubbles with diameter of 0.2 mm are arranged in quiescent water, and a vortex ring is launched toward the bubbles. The behavior of the vortex ring and the bubble motion are analyzed. The diameter of the vortex ring at the launch is 42.5 mm, the Reynolds number is 500, and the bubble volume fraction at the launch is less than 0.04. The simulation highlights that the vortex ring convects in the bubble cluster with shoving the bubbles and that the bubbles are entrained and involved by the vortex ring. It also clarifies the changes of the diameter and circulation of the vortex ring.

Copyright © 2011 by JSME

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