Measurement of Bubble Size, Gas holdup and Interfacial Area in Bubble Columns using Image Processing Techniques
Agarwal, N.1, Verma, A. K.2
1Agarwal, N.*, Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India. E-mail:
2Verma, A. K., Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India.
Manuscript received on October 14, 2019. | Revised Manuscript received on 24 October, 2019. | Manuscript published on November 10, 2019. | PP: 4475-4479 | Volume-9 Issue-1, November 2019. | Retrieval Number: A5332119119/2019©BEIESP | DOI: 10.35940/ijitee.A5332.119119
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Bubble sizes in bubble column affect transfer processes. Therefore, it’s important to calculate bubble size and interfacial area. Bubble size distribution (BSD) in a bubble column of rectangular cross section with dimensions 0.2m x 0.02m was measured using photographic method (400 fps) for air-water system. Gas holdup, Sauter-mean bubble diameter, aspect ratio and specific interfacial area were estimated from BSD. Effect of superficial gas velocity and static bed height on these parameters was investigated. The bubble size distribution exhibited mono-modal distribution showing the presence of non-uniform homogeneous bubbling regime. The frames of video were analysed using image processing steps to obtain major and minor axis of elliptical bubbles. Values of d32, , and ai were estimated from the data. The value of d32 increased with increasing Ug but is independent of Hs. The values of d32 were somewhat higher than the values reported by other investigators. The value of ai increases with increasing Ug and with decreasing Hs. Present values of compared well with the data reported in literature.
Keywords: Bubble Column, Bubble Size, Bubble Size Distribution, Gas Holdup, Interfacial Area, Image Processing, Multi-Phase System.
Scope of the Article: Image Processing and Pattern Recognition