物理学报Issue(8)：1-7,7.DOI:10.7498/aps.62.084707
实验观测液滴撞击倾斜表面液膜的特殊现象
Special phenomena of droplet impact on an inclined wetted surface with experimental observation∗
摘要
Abstract
The phenomena of droplet impact on an inclined solid surface covered with a pre-existing liquid film are observed using high speed camera at 10000 frames per second. The processes of droplet spreading, liquid sheet formation, splashing and droplet oscillation are observed and analyzed. From the results the relationship between spreading velocity and time is discussed quantitatively. Besides, the effects of impact velocity and impact angle on front and back spreading factors and initiatory spreading velocity are also revealed. At the impact angles ranging from 28.0◦ to 74.7◦, it is found that with the decrease of impact angle, the deformation degree of the droplet oscillation on the film surface increases. The results also indicate that the front spreading factor can increases by increasing impact velocity or by reducing the impact angle, whereas the back spreading factor increases with impact angle increasing. The impact velocity almost has no influence on it. The initial spreading velocity can increase by increasing the impact velocity and the impact angle.关键词
液滴撞击/倾斜液膜/铺展因子/铺展速度Key words
drop impact/inclined liquid film/spreading factor/spreading velocity引用本文复制引用
梁刚涛,沈胜强,郭亚丽†,陈觉先,于欢,李熠桥..实验观测液滴撞击倾斜表面液膜的特殊现象[J].物理学报,2013,(8):1-7,7.基金项目
国家自然科学基金(批准号:51176017,50976016)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant Nos.51176017,50976016) （批准号:51176017,50976016）
