FIGURE 9 Patterns of typical microbubbles formed by ceramic membrane: (A) sparse bubble flow, (B) dense bubble flow, (C) slug flow; (D) Micron bubble captured by a telecentric len
The liquid among bubbles flows upwards, while the liquid layer between the bubbles and the pipe wall flows downwards slowly. Under the flow of slug flow, the bubbles gather into gas bombs, and the phase interfacial area between gas and liquid decreases. Therefore, the gas flow rate and liquid flow rate of the CMGD should be controlled as much as possible within the bubble flow range to obtain a high gas-liquid interfacial area.

3.3 Bubble Size