规整填料表面液体分布的计算流体力学  

Computational fluid dynamics study of liquid distribution on structured packing surface

作　　者：谭丽媛[1] 袁希钢[1] KALBASSI Mohammad Ali 

机构地区：[1]天津大学化学工程联合国家重点实验室,天津300072 [2]Air Products Public Limited Company,Walton on Thames,UK

出　　处：《化工进展》2015年第9期3221-3231,3237,共12页Chemical Industry and Engineering Progress

摘　　要：采用计算流体力学(computational fluid dynamics,CFD)中的VOF方法对规整填料表面液相分布进行了三维建模和仿真,实现规整填料内液相分布的可视化并得到了液膜厚度和有效相界面积比等相关定量信息。通过分析比较不同物系的数值模拟结果,发现液体的表面张力和黏度都对填料表面上液体分布有影响。表面张力越小,液相在填料片上分布越均匀,有效相界面积比越大,液膜厚度越小;黏度增加,有效相界面积比和液膜厚度也随之增加。较之于黏度对液相分布的影响程度,表面张力的影响程度更大,为主要影响因素。本文还提出一个预测有效相界面积比的新公式,并将数值模拟结果与已有文献进行对比,吻合性较好。A volume of fluid （VOF） model of the computational fluid dynamics （CFD） method was used to simulate the liquid distribution on the structured packing surface. 3D simulation visualized liquid distribution. The results were used to estimate liquid film thickness and effective interfacial area ratio on the structured packing surface quantitatively,and the results were validated with existing correlations in the literature. Different systems with different surface tension values were used in the simulation and the effect of both surface tension and viscosity of liquid phase on liquid distribution were examined. Based on the simulation a new equation to predict the effective interfacial area ratio was proposed. The simulation results showed that the CFD method can be used as an effective tool to provide information on the details of the gas and liquid flows in complex packing geometries.

关 键 词：计算流体力学 可视化 液膜厚度 有效相界面积比 表面张力 黏度 

分 类 号：TQ028[化学工程]