Coalescence Characteristics of Droplets Containing Surfactants on Topographic Substrates

Authors

Xuemin Ye, Key Laboratory for Condition Monitoring and Control of Power Plant Equipment, Ministry of Education, North China Electric Power University, Baoding 071003, China;
Yuxi Lin, Key Laboratory for Condition Monitoring and Control of Power Plant Equipment, Ministry of Education, North China Electric Power University, Baoding 071003, China;
Lifang Lu, Key Laboratory for Condition Monitoring and Control of Power Plant Equipment, Ministry of Education, North China Electric Power University, Baoding 071003, China;
Chunxi Li, Key Laboratory for Condition Monitoring and Control of Power Plant Equipment, Ministry of Education, North China Electric Power University, Baoding 071003, China;

Abstract

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.

Recommended Citation

Ye, Xuemin; Lin, Yuxi; Lu, Lifang; and Li, Chunxi (2019) "Coalescence Characteristics of Droplets Containing Surfactants on Topographic Substrates," Journal of System Simulation: Vol. 30: Iss. 8, Article 20.
DOI: 10.16182/j.issn1004731x.joss.201808020
Available at: https://dc-china-simulation.researchcommons.org/journal/vol30/iss8/20

First Page

2982

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.201808020

Last Page

2990

CLC

TP311.51

Recommended Citation

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.

DOI

10.16182/j.issn1004731x.joss.201808020