毛细管中液液弹状流的流体力学数值模拟
第32卷第1期高校化学工程学报No.1 V ol.32 2018 年 2 月 Journal of Chemical Engineering of Chinese Universities Feb. 2018文章编号：1003-9015(2018)01-0053-07网络出版地址：https://www.360docs.net/doc/7b3749043.html,/kcms/detail/33.1141.TQ.20171227.1647.012.html
毛细管中液液弹状流的流体力学数值模拟
宋洪利1, 王燕飞2, 许松林1
(1. 天津大学化工学院, 系统生物工程教育部重点实验室, 天津 300350;
2.中国检验检疫科学研究院, 北京 100176)
摘 要：随着精细加工技术的进步和新材料的出现，微柱液相色谱又称毛细管液相色谱在分离和分析过程中发挥着越
来越重要作用。对于毛细管中的两相流流动，弹状流是最常见也是最稳定的流型之一。文章介绍了毛细管中液液弹状
流的数值模拟。以直径为0.2 mm的T型毛细管为模型，使用商用计算流体力学(CFD)Fluent(16.2)软件研究弹状流的
液弹长度、液膜厚度、液弹速度等流体力学特性。确定液弹长度与两相流率、毛细管数等参数有关。液弹长度随分散
相流率增加而变大，随连续相流率和毛细管数的增大而减小。液膜厚度与文献中的计算模型吻合很好。液弹速度随混
合速度的增大而增大。根据模拟数据得到液弹长度与液弹速度的关联式，且与文献实验值比较，结果吻合性较好。
关键词：毛细管液相色谱；液液弹状流；计算流体力学；流体力学
中图分类号：TQ021.1 文献标识码：A DOI：10.3969/j.issn.1003-9015.2017.00.051
Numerical Simulation on Hydrodynamics of Liquid-Liquid Slug Flow in Capillary
SONG Hong-li1, WANG Yan-fei2, XU Song-lin1
(1. Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and
Technology, Tianjin University, Tianjin 300350, China; 2. Chinese Academy of Inspection and Quarantine,
Beijing 100176, China)
Abstract: With the advancement of microfabrication techniques and emergency of new materials, microcolumn liquid chromatography (or capillary liquid chromatography) has shown potential application in separation and analysis. Slug flow is one of the most common and stable flow patterns for two phase flow in capillary. Numerical simulation of liquid-liquid slug flow in capillary was studied and a T-junction empty capillary with diameter of 0.2mm was used. Commercial computational fluid dynamics (CFD) package FLUENT (Release16.2) was used to investigate the hydrodynamics of slug flow including slug length, the thickness of liquid film and slug velocity. The dependence of slug length on flow rates and other parameters like capillary number was determined. The results show that slug length increases as the flow rate of the dispersed phase increases, and it decreases as the flow rate of the continuous phase and capillary number increase. The film thickness is well predicted by available models. Correlation of slug length and slug velocity is developed based on the simulated data which has good agreement with the experimental data.
Key words: microcolumn liquid chromatography; liquid-liquid slug flow; computational fluid dynamics;
hydrodynamics
1前 言
毛细管液相色谱是一种高效的色谱分离技术，具有固定相用量少，流动相消耗少，样品消耗少，环境污染少等优点[1]。毛细管液相色谱的核心部件是毛细管柱，其管径通常为毫米级与微米级，由于表面
收稿日期：2017-07-11；修订日期：2017-10-22。网络出版时间：2017-12-28 10:44:46
基金项目：国家重点研发计划(2016YFF0203802)；中国检科院基本科研业务费(2016JK017)。
作者简介：宋洪利(1992-)，女，山东聊城人，天津大学硕士生。通讯联系人：许松林，E-mail：slxu@https://www.360docs.net/doc/7b3749043.html,
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