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Mixing Technology of Stratified Density Layer by Gas-Liquid Two-Phase Jet

[+] Author Affiliations
Kyota Shimazaki, Kyosuke Sato, Naoki Horiguchi, Tetsuya Kanagawa, Akiko Kaneko, Yutaka Abe

University of Tsukuba, Tsukuba, Japan

Isho Yamaguchi, Kanetoshi Hayashi

JFE Engineering Corporation, Chiyoda, Japan

Paper No. AJKFluids2015-30208, pp. V01AT30A001; 5 pages
doi:10.1115/AJKFluids2015-30208
From:
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1A: Symposia, Part 2
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-3
  • Copyright © 2015 by JSME

abstract

This paper experimentally treats the mixing of a two-layer density-stratified fluid generated by gas-liquid two-phase jet in a cubic tank. The purpose of this study is to clarify the mixing optimum by gas-liquid two-phase jet for destruction of density stratification. The upper and lower fluids were water and salt water, respectively, with the lower fluid issued vertically upward from a circular nozzle put at the center of the bottom in the tank. We conducted the mixing experiment, the experimental parameters were the total superficial velocity and the volumetric flow ratio of the jet. The total superficial velocity and the volumetric flow ratio of the jet range from 1.5 to 6.0 m/s and from 0 to 1.0, respectively. The mixing behaviors of density stratification were visualized and the density variation during the mixing was measured in situ. Based on the visualized and measured results, an evaluation method for the mixing time was developed. We discussed the relation between the experimental parameters and the mixing time. Then, it was clarified that different behaviors between liquid jet and gas-liquid two-phase jet were observed and the effect of the volumetric flow ratio of the jet on the mixing time was varied in each the total superficial velocity of the jet.

Copyright © 2015 by JSME
Topics: Density

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