A Theoretical Model for the Size Prediction of Single Bubbles Formed under Liquid Cross-flow

• Published in: Chinese journal of chemical engineering Vol. 18; no. 5; pp. 770 - 776
• Main Author: 刘长军 梁斌 唐盛伟 张海广 闵恩泽
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2010
• Subjects: bubble formation; Bubbles; Buoyancy; Chemical engineering; Contactors; force balance; Inertia; liquid cross-flow; Liquids; Mathematical models; one stage model; Surface tension; 孔口尺寸; 实验数据; 接触性能; 模型预测; 气泡直径; 泡沫经济; 粒度分布; force balance; one stage model; liquid cross-flow; bubble formation
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(09)60128-2

The size of initial bubbles is an important factor to the developed bubble size distribution in a gas-liquid contactor. A liquid cross-flow over a sparger can produce smaller bubbles, and hereby enhance the performance of contactor. A one stage model by balancing the forces acting on a growing bubble was developed to describe the formation of the bubble from an orifice exposed to liquid cross-flow. The prediction with this model agrees with the experimental data available in the literatures, and show that orifice size strongly affects the bubble size. It is showed that the shear-lift force, inertia force, surface tension force and buoyancy force are major forces, and a simplified mathematical model was developed, and the detachment bubble diameter can be predicted with accuracy of ±21%.