Abstract
Based on the premise that two bubbles can merge online, this study uses a combination of experiment and numerical simulation to study the influence of the initial bubble size and initial spacing on the difference mechanism of bubble rise speed. It is found that when the bubble diameter is 4–6 mm, the initial bubble size has little effect on the bubble rising velocity difference, and the ultimate velocity of the two bubbles before coalescence is basically the same. The initial bubble spacing has a great effect on the bubble rising velocity difference, and the increase of the initial bubble spacing will increase the ultimate velocity before coalescence, larger ultimate velocity will produce velocity fluctuations when the bubbles collide and contact, which reduces the velocity stability. This study systematically analyzed the influence of initial bubble size and initial bubble spacing on bubble coalescence behavior, and provided a theoretical reference for the design of the orifice plate structure of the airlift loop reactor.
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Acknowledgment
The work described in this article has been conducted as part of the National Natural Science Foundation of China (Grant No. 52070123).
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Liu, B. et al. (2022). Study on the Mechanism of Bubble Coalescence in an Air-Lift Loop Reactor. In: Wang, Y., Martinsen, K., Yu, T., Wang, K. (eds) Advanced Manufacturing and Automation XI. IWAMA 2021. Lecture Notes in Electrical Engineering, vol 880. Springer, Singapore. https://doi.org/10.1007/978-981-19-0572-8_36
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DOI: https://doi.org/10.1007/978-981-19-0572-8_36
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