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Velocity and Concentration Field Measurements in Bubble-Driven Turbulent Liquid Flows

[+] Author Affiliations
Won Taek Jeong, Seung Jae Yi, Hyun Dong Kim, Kyung Chun Kim

Pusan National University, Busan, Korea

Sang Moon Kim

Doosan Heavy Industry, Changwon, Korea

Paper No. AJK2011-11007, pp. 2677-2684; 8 pages
doi:10.1115/AJK2011-11007
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 KSME

abstract

In this study, simultaneous measurements of velocity and concentration fields using the time-resolved particle image velocimetry (PIV) and planar laser induced fluorescence (PLIF) methods have conducted to investigate mixing characteristics in turbulent water flows driven by air bubbles in a cylindrical water tank. The flow rates of compressed air is changed from 1 to 5 L/min at 0.5 MPa and the corresponding range of bubble based Reynolds number is from 8,320 to 22,100. PLIF measurement results demonstrate that the mixing efficiency is enhanced with increase of gas flow rate. The sloshing motion of the free surface is also effective to the scalar mixing process since the vertical motion can be correlated with concentration fluctuation and increase turbulent dispersion process.

Copyright © 2011 by KSME

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