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http://dx.doi.org/10.5407/JKSV.2017.15.2.048

A Study on Bubble Behavior Generated by an Air-driven Ejector for ABB (Air Bubble Barrier) (I): Development of Image Processing Method and Statistical Analysis  

Seo, Hyunduk (School of Mechanical Engineering, Pusan National University)
Aliyu, Aliyu Musa (School of Mechanical Engineering, Pusan National University)
Kim, Minkyun (Infra & Offshore Research Team, GS Engineering & Construction)
Kim, Kyung Chun (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of the Korean Society of Visualization / v.15, no.2, 2017 , pp. 48-58 More about this Journal
Abstract
To analyze bubbles generated by an ABB (Air Bubble Barrier), we developed image processing procedure and statistical analysis method. Air was discharged from 5 mm nozzle as swarm form at the bottom of 1 m3 water tank. Flow rates of discharged air are ranged from 2 L/min to 20 L/min and these are corresponding to Reynolds number of 1766-17663. Rise velocity of bubble is extracted by using image process pretending intrusive method. Mean equivalent velocity was calculated using void fraction weighting factor. Bubble diameter is obtained and compared with correlations in the literature. Also, we present a correlation according to the result of this study. Mean velocity and mean diameter of bubbles increase with increasing gas Reynolds number. But these parameters show an asymptotic trend when they approach to high Reynolds number.
Keywords
Air Bubble Barrier; Image Processing; Bubble Swarm; Flow Visualization;
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Times Cited By KSCI : 1  (Citation Analysis)
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