Modeling and validation of the momentum force for bubble formation from submerged orifices with an oscillatory air supply
Microbubbles are applied in various industrial fields. The bubble size is crucial to the process efficiency. Recent studies have shown that the replacement of steady air supply by oscillatory air supply could significantly decrease the sizes of bubbles formed from submerged orifices, owing to the increased momentum force, which is a lifting force for bubble formation. However, the responses of the momentum force to the oscillatory air supply are not yet clear. This study provides a qualitative model for the momentum force as a function of the characteristics of the oscillatory air supply, including the switching frequency, on/off time ratio, and gas flow rate. The model was experimentally validated by investigating the variations in the momentum force with the characteristics of the oscillatory air supply. In addition, the correlation between the momentum force and bubble size under the oscillatory air supply was also investigated.
危险品化学品经营许可证（带存储）