HiGee Microbubble Generator: (II) Controllable Preparation of Microbubbles
Lan Jiang, Lihua Wang, Hailong Liao, Wentao Jiang, Qian Luo, Guang‐Wen Chu, Yong Luo
Abstract
Microbubbles can significantly intensify the gas–liquid mass transfer process. With the current bubble generators, it is difficult to achieve the controllable preparation of microbubbles with gas–liquid volume flow rate ratios greater than 0.5, which limits the applications of the microbubble technology. In our manuscript (I), a HiGee microbubble generator (HMG) has been developed with a variable energy dissipation rate. In this work, the HMG was first employed to produce microbubbles. Under the experimental conditions, the Sauter mean diameter (d32) of the microbubbles was 100–300 μm and could be easily adjusted by the rotational speed. The deviations between the d32 calculated by the energy dissipation rate model established in manuscript (I) and the experimental values were within ±10%, demonstrating the reliability of the energy dissipation rate model of HMG. Compared with other bubble generators, HMG is proved to be an excellent generator to produce controllable microbubbles, especially for relatively high gas–liquid volume flow rate ratio processes.