化工学报2025，Vol.76Issue(3)：1029-1039,11.DOI:10.11949/0438-1157.20241002
基于水下凹壁面上双油滴撞壁-聚并过程分析
Analysis of double droplets impact-coalescence process based on underwater concave-wall
摘要
Abstract
The CLSVOF model and dynamic adaptive grid were used to numerically simulate the impact-coalescence process of double droplets on the concave-wall in still water.The results indicate that double droplet coalescence behavior occurred during the rolling and sliding process on the concave-wall with the underwater oleophobic materials,the droplet spreading edges contacted and coalescented after impact on the underwater oleophilic surface.The spreading diameter d,the endpoint distance of double droplets on the concave-wall δ,and the maximum spreading factor β were used to classify three liquid bridge forms.For β≤3.1,droplets coaled and formed a single liquid bridge.For β>3.1 and δ/d<3,a hollow ring with high pressure at the inner edge was formed when the right droplet impacted on concave-wall,and double liquid bridges were formed because of the expansion of the oil droplet spreading area.For β>3.1 and δ/d≥3,a single liquid bridge with a hollow ring was formed,but the wetting area fluctuated after coalescence.The single liquid bridge formed by the coalescence of double droplets has a larger dimensionless flow area.The single liquid bridge was more stable than the double liquid bridge.However,double liquid bridge shortened the duration of the impact wall to coalescence.The discoveries provided a useful theory for understanding the collision and coalescence mechanisms of heterogeneous phases near the cyclone wall.The shortcoming of the coalescence theory on discrete phase droplets was supplemented.关键词
水下双油滴/凹壁面/CLSVOF/撞壁/聚并/液桥Key words
underwater double droplets/concave-wall/CLSVOF/impact wall/coalescence/liquid bridge分类
数理科学引用本文复制引用
张静,杨光,菅爱博,程思淼,王绍哲,龚斌..基于水下凹壁面上双油滴撞壁-聚并过程分析[J].化工学报,2025,76(3):1029-1039,11.基金项目
辽宁省应用基础研究计划项目(2022JH2/101300077) （2022JH2/101300077）
辽宁省教育厅高等学校基本科研项目(JYTMS20231507) （JYTMS20231507）
