波纹状基底上含表面活性剂液滴的聚并特征

doi:10.16182/j.issn1004731x.joss.201808020

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (8): 2982-2990.doi: 10.16182/j.issn1004731x.joss.201808020

波纹状基底上含表面活性剂液滴的聚并特征

叶学民, 林瑜茜, 卢丽芳, 李春曦

华北电力大学电站设备状态监测与控制教育部重点实验室,保定 071003

收稿日期:2017-01-04 出版日期:2018-08-10 发布日期:2019-01-08
作者简介:叶学民(1973-),男,邢台,博士,教授,研究方向为流体动力学理论及应用; 林瑜茜(1992-),女, 邵武, 硕士生, 研究方向为流体动力学理论及应用; 卢丽芳(1992-), 女, 硕士, 朔州, 研究方向为流体动力学理论及应用。
基金资助:
国家自然科学基金青年科学基金(11202079)

Coalescence Characteristics of Droplets Containing Surfactants on Topographic Substrates

Ye Xuemin, Lin Yuxi, Lu Lifang, Li Chunxi

Key Laboratory for Condition Monitoring and Control of Power Plant Equipment, Ministry of Education, North China Electric Power University, Baoding 071003, China

Received:2017-01-04 Online:2018-08-10 Published:2019-01-08

摘要/Abstract

摘要： 针对两个相同的含表面活性剂液滴在波纹基底上的聚并行为,基于润滑理论建立了液滴运动演化模型,模拟了液滴在波纹基底波峰上的聚并历程,探讨了液滴初始间距,波数和基底高度对聚并特征的影响。结果表明：两液滴在毛细力驱动下逐渐相遇并叠加,最终在t_f时聚并形成一“新”液滴。液滴随时间的变化分为5个不同阶段;活性剂浓度在短时间内完成三个阶段变化;增大间距a将延长液滴聚并时间;增大波数k会使液滴的聚并趋向于不稳定;基底高度D的增大将缩短液滴聚并所需时间。

关键词: 聚并, 表面活性剂, 初始间距, 波数, 基底高度, "新"液滴

Abstract: The droplet motion evolution model was established based on the lubrication theory for two identical surfactant-containing droplets on the topographic substrate. The coalescing process of the droplets on topographic substrate was simulated, and the effects of spacing, wave number and base height on the characteristics of coalescing were examined. The results show that the two droplets meet and superimpose each other under the capillary force, and finally form a “new” droplet at t_f. The dynamics of droplet over time are divided into five stages; while the surfactant concentration experiences the three stages in a short period; increasing spacing a extends the coalescing time of droplets; whereas increasing the wave number k leads droplet coalescing to be unstable; raising base height D shortens the coalescing time.

Key words: coalescence, surfactant, initial spacing, wave number, base height, "new"droplet

中图分类号:

TP311.51

叶学民, 林瑜茜, 卢丽芳, 李春曦. 波纹状基底上含表面活性剂液滴的聚并特征[J]. 系统仿真学报, 2018, 30(8): 2982-2990.

Ye Xuemin, Lin Yuxi, Lu Lifang, Li Chunxi. Coalescence Characteristics of Droplets Containing Surfactants on Topographic Substrates[J]. Journal of System Simulation, 2018, 30(8): 2982-2990.

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波纹状基底上含表面活性剂液滴的聚并特征

Coalescence Characteristics of Droplets Containing Surfactants on Topographic Substrates

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