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浙江大学学报(工学版)
浙江大学学报(工学版)  2021, Vol. 55 Issue (7): 1391-1398    DOI: 10.3785/j.issn.1008-973X.2021.07.018
能源与环境工程     
电场作用下液液系统中液滴变形的计算模型
张军1,2(),崔玉敏1,2,何宏舟1,2
1. 集美大学 海洋装备与机械工程学院，福建 厦门 361021
2. 集美大学 福建省能源清洁利用与开发重点实验室，福建 厦门 361021
Numerical calculation model on discrete droplet deformation in liquid-liquid system under electric field
Jun ZHANG1,2(),Yu-min CUI1,2,Hong-zhou HE1,2
1. School of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
2. Fujian Province Key Laboratory of Energy Cleaning Utilization and Development, Jimei University, Xiamen 361021, China
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摘要：

基于单元变形的思路，由单元守恒方程出发，建立电场中液滴变形的数值计算模型. 在此基础上，将该模型与偶极模型相耦合，提出液滴聚结的计算方法. 由所建模型及计算方法，编制数值计算程序对几种参数下液滴的变形及聚结进行模拟计算. 结果表明，所建模型对液滴变形的预测与实验结果相符较好，对液滴聚结过程的模拟与实验结果大致相符，预测的聚结时间稍低于实验值. 如果进一步提高单元阻力的模化精度及单元离散精度，所建模型会有较好的适用性. 所建模型可实现对液滴的扁平形变形的预测. 研究结果对液滴电变形的理论分析及数值模拟具有一定的借鉴意义.
关键词： 液滴变形;  液液系统;  数值模拟;  模型;  液滴聚结    
Abstract:

Based on the idea of element deformation, a numerical calculation model on droplet deformation in the electric field was established, from the element conservation equation. The model was coupled with the dipole model, and a calculation method on droplet coalescence was also proposed. Based on the established model and calculation method, a numerical calculation program was compiled the deformation and coalescence of droplets under several parameters were simulated. Results show that the prediction of droplet deformation is in good agreement with the experiment, the prediction of droplet coalescence is roughly consistent with the experiment and the predicted coalescence time is slightly lower than the experimental value. If the modeling accuracy of element resistance and the discrete accuracy of element are further improved, the model will have better applicability. The simulation results also show that the present model can be also used to predict the oblate deformation of droplets. The work has an active role for the theoretical analysis and numerical simulation of droplet deformation.
Key words: droplet deformation    liquid-liquid system    numerical simulation    model    droplet coalescence
收稿日期: 2020-05-12 出版日期: 2021-07-05
CLC:  TQ 021.1  
基金资助: 福建省科技计划资助项目（2017H0024）
作者简介: 张军（1966—），男，博士，教授，从事多相流动及电流体力学研究. orcid.org/0000-0003-4838-7526. E-mail： bull0202@sina.com
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引用本文:

张军,崔玉敏,何宏舟. 电场作用下液液系统中液滴变形的计算模型[J]. 浙江大学学报(工学版), 2021, 55(7): 1391-1398.

Jun ZHANG,Yu-min CUI,Hong-zhou HE. Numerical calculation model on discrete droplet deformation in liquid-liquid system under electric field. Journal of ZheJiang University (Engineering Science), 2021, 55(7): 1391-1398.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2021.07.018    或    https://www.zjujournals.com/eng/CN/Y2021/V55/I7/1391

图 1  液滴单元划分
图 2  液滴单元关系的示意图
图 3  液滴形状比较
图 4  2个液滴聚结实验照片
图 5  液滴聚结实验结果预测
图 6  液滴扁平变形的模拟
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