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tf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。
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 tf. 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.
作者
叶学民
林瑜茜
卢丽芳
李春曦
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 07 1003,China)
出处
《系统仿真学报》
CAS
CSCD
北大核心
2018年第8期2982-2990,共9页
Journal of System Simulation
基金
国家自然科学基金青年科学基金(11202079)
