Effects of microbubbles on removal of viscous oil adhering to channel wall
Chemical Engineering Research and Design, ISSN: 0263-8762, Vol: 193, Page: 75-84
2023
- 2Citations
- 4Captures
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Article Description
It has been reported that the addition of microbubbles in a water flow enhances a cleaning efficiency of oil adhering to a channel wall. However, the enhancement mechanism of the cleaning effect has not been sufficiently understood yet. Experiments on the removal effects of water flows in a horizontal channel with and without microbubbles were therefore conducted to investigate the removal process by microbubbles. Silicone oil adhering to the bottom wall of the channel was used as dirt. The local thickness of the oil was measured during cleaning from micrographs of fluorescence intensity. The amount of oil removed by the water flow increased with increasing the Reynolds number. Adding microbubbles to the water flow increased the amount of removed oil. Microbubbles attached to the oil interface under turbulent conditions, and the bubbles grew by mass transfer through the gas-liquid interface and bubble coalescence. The detachment of bubbles grown on the oil interface led to oil peel-off, resulting in an improvement of cleaning effect.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0263876223001673; http://dx.doi.org/10.1016/j.cherd.2023.03.020; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85150925996&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0263876223001673; https://dx.doi.org/10.1016/j.cherd.2023.03.020
Elsevier BV
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