Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

For Online Access

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2006, Volume18

Issue 2

92 pages

DOI: 10.1615/MultScienTechn.v18.i2

Issue price - $150.00

Yuichi Murai
Hokkaido University, Sapporo 060-8628, Japan

Jian Wu Qu
University of Fukui, Fukui 910-8507, Japan

Fujio Yamamoto
University of Fukui, Fukui 910-8507, Japan

Three-dimensional bubble-bubble interaction in quiescent liquid is investigated experimentally using a stereoscopic bubble-tracking technique. An accurate labeling method and a three-dimensional stereo-matching method are applied to the measurement of the three-dimensional centroid for individual bubbles. The velocity vectors of the bubbles are measured by a 3-D four-time-step tracking algorithm and then the relative velocity vectors of two nearest-neighbor bubbles are captured with high statistic reliability. With the measurement data for intermediate Reynolds numbers ranging from 5 to 75, the vertical attraction and the horizontal repulsion are confirmed for Re < 10 as known by a past study based on Navier-Stokes simulation. The new finding of the present measurement is that bubbles of Re > 30 have more repulsive velocity both in the horizontal and the vertical directions because they rise closely. Moreover, the three-dimensional structure of the bubble-bubble interaction is discussed with the data analysis of the interaction vector fields.

DOI: 10.1615/MultScienTechn.v18.i2.40 Download article, 175-197 pages

Article price - $45.00

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