Measurement of Thickness of Foam layer and Entrance Region in a Bubble Column using Image Processing Technique
Neha Agarwal1, Ashok Kumar Verma2
1Neha Agarwal, Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India.
2Ashok Kumar Verma, Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India.
Manuscript received on 04 August 2019 | Revised Manuscript received on 09 August 2019 | Manuscript published on 30 August 2019 | PP: 3776-3781 | Volume-8 Issue-10, August 2019 | Retrieval Number: J99710881019/2019©BEIESP | DOI: 10.35940/ijitee.J9971.0881019
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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: Photographic method is a direct method for study of bubble behavior. Hydrodynamic study in a rectangular bubble column (0.37m X 0.2m X 0.02m) for air-water system was studied using photographic technique by recording movie at 120fps. Image processing tools were applied to measure regions of gas-liquid dispersion, entrance, foam layer and bubble-bursting were identified. The foam layer thickness showed maxima at Ug = 0.1 m s-1. It decreased with increasing static bed height. The width of entry region also passed through maxima, though it was not sharp. The width of entry region increased with increasing settled bed height. Gas holdup measured in terms of pixel density deviated from experimental values with increasing superficial gas velocity due to overlapping bubbles. The average gas holdup decreased with increasing static bed height.
Keywords: Bubble Column, Gas Holdup, Hydrodynamics, Iimage Processing, Multi-Phase System.
Scope of the Article: Measurement & Performance Analysis