Numerical simulation of bubble changes in an oil film impacted by oil droplets via a coupled level set and volume-of-fraction method

被引：7
作者：
Zhou, Jian-hong [1 ]
Tong, Bao-hong [1 ]
Wang, Wei [2 ]
Su, Jia-lei [1 ]
Hu, Xiao-lei [1 ]
机构：
[1] Anhui Univ Technol, Sch Mech Engn, Maanshan, Peoples R China
[2] Hefei Univ Technol, Inst Tribol, Hefei, Peoples R China
来源：
FLUID DYNAMICS RESEARCH | 2019年 / 51卷 / 02期
基金：
中国国家自然科学基金;
关键词：
droplet impact; bubble; numerical simulation; VISCOUS-LIQUIDS; SURFACE-TENSION; AIR BUBBLES; BREAKUP; DYNAMICS; FLOWS; MODEL; COALESCENCE; SHAPE; RISE;
D O I：
10.1088/1873-7005/aaf81a
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A coupled level set and volume-of-fraction method is applied to investigate the impact of an oil droplet on an oil film containing a bubble. Subsequently, the deformation of the bubble is analyzed. Simulation results show two different movement forms of bubbles after an oil droplet impacts an oil film under different impacting velocities: stable deformation and bubble breaks. Bubble breaks originate from the combined action of surface tension and viscous shear force. Oil film thickness also affects bubble deformation. As the film thickness decreases, the deformation quantity of bubbles increases. Thus, bubbles are easily broken. This study provides a basic guide for bubble dynamics when a droplet impacts a film.
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页数：16
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