Simulation of droplet deformation in uniform electric field with dissipative particle dynamics approach

doi:10.3969/j.issn.0438-1157.2014.10.017

CIESC Journal ›› 2014, Vol. 65 ›› Issue (10): 3872-3877.DOI: 10.3969/j.issn.0438-1157.2014.10.017

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Simulation of droplet deformation in uniform electric field with dissipative particle dynamics approach

ZHANG Jun^1,2, HE Hongzhou^1,2, HUANG Guanxing¹

1 Cleaning Combustion and Energy Utilization Research Center of Fujian Province, School of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, Fujian, China;
2 Fujian Province Key Laboratory of Energy Cleaning Utilization and Development, Jimei University, Xiamen 361021, Fujian, China

Received:2014-02-24 Revised:2014-07-08 Online:2014-10-05 Published:2014-10-05
Supported by:
supported by the Natural Science Foundation of Fujian Province(2014J01201) and Special Project of Fujian Provincial Department of Education(JK2012027).

均匀电场中液滴变形特性的耗散粒子动力学模拟

张军^1,2, 何宏舟^1,2, 黄冠星¹

1 集美大学机械与能源工程学院, 福建省清洁燃烧及能源高效利用工程技术研究中心, 福建厦门 361021;
2 福建省能源清洁利用与开发重点实验室, 福建厦门 361021

通讯作者: 张军
基金资助:
福建省自然科学基金项目（2014J01201）；福建省高校专项（JK2012027）。

Abstract

Abstract: Based on DPD method, a particle mechanical model of the droplet in immiscible liquid in a uniform electric field was developed and the drop deformation process was simulated. There was better consistency in drop shape between simulation and experiment, and deviation was observed only in the case of large deformation. The simulated results also showed that at lower electric field strength drop deformation did not grow up with time, but was in an oscillation state. With increasing electric field strength, oscillation amplitude of droplet deformation increased while oscillation frequency decreased. When field strength increased to a specific value, oscillation could not be maintained and drop deformation sharply increased with time, leading to droplet breakup. The higher the field strength, the shorter the time required for drop breakup.

Key words: electric field, drop deformation, dissipative particle dynamics, simulation, algorithm, interfacial tension

摘要： 基于耗散粒子动力学方法，建立了电场作用下近似的液滴粒子力学模型，对两相不相溶液体中液滴在电场作用下的变形特性进行了模拟。模拟结果与他人的实验结果比较表明，模拟结果对液滴形状随时间的演化预测基本符合实际，仅在液滴变形较大时有一定偏差。模拟结果还表明，当外加场强较小时，液滴变形度随时间呈现振荡状态，变形度不会随时间继续增大。增大外加场强，液滴变形幅度增大，振荡频率变慢。当外加场强增大到一定程度时，液滴变形度不再振荡，而是随时间急剧增大，以至液滴最终破碎。场强越大，液滴破碎所需的时间也越短。

关键词: 电场, 液滴变形, 耗散粒子动力学, 模拟, 算法, 界面张力

CLC Number:

TQ021.1

ZHANG Jun, HE Hongzhou, HUANG Guanxing. Simulation of droplet deformation in uniform electric field with dissipative particle dynamics approach[J]. CIESC Journal, 2014, 65(10): 3872-3877.

张军, 何宏舟, 黄冠星. 均匀电场中液滴变形特性的耗散粒子动力学模拟[J]. 化工学报, 2014, 65(10): 3872-3877.

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Simulation of droplet deformation in uniform electric field with dissipative particle dynamics approach

均匀电场中液滴变形特性的耗散粒子动力学模拟

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