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A Theoretical Model for the Size Prediction of Single Bubbles Formed under Liquid Cross-flow 被引量:3

A Theoretical Model for the Size Prediction of Single Bubbles Formed under Liquid Cross-flow
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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%.
出处 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 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)
关键词 bubble formation liquid cross-flow one stage model force balance 模型预测 气泡直径 横流 粒度分布 接触性能 泡沫经济 实验数据 孔口尺寸
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