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

作　　者：刘长军 梁斌 唐盛伟 张海广 闵恩泽 

机构地区：[1]Multi-phases Mass Transfer and Reaction Engineering Laboratory, College of Chemical Engineering, Sichuan University, Chengdu 610065, China [2]SINOPEC CORP. Research Institute of Petroleum Processing, Beijing 100083, China

出　　处：《Chinese Journal of Chemical Engineering》2010年第5期770-776,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （20736009）

摘　　要：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%.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%.

关 键 词：bubble formation liquid cross-flow one stage model force balance 

分 类 号：O4-33[理学—物理] TQ541[化学工程—煤化学工程]