实验流体力学2026，Vol.40Issue(4)：130-137,8.DOI:10.11729/syltlx20260001
液滴撞击超疏水单狭缝表面的实验研究
Experimental study of droplet impact on superhydrophobic single-slot surfaces
摘要
Abstract
Existing studies of droplet impact dynamics on superhydrophobic surfaces have predominantly focused on conventional substrates lacking macroscopic geometric features,while comparatively limited attention has been given to non-conventional surfaces with macro-structures that are common in practical engineering.In this study,we experimentally investigate the impact dynamics of droplets on superhydrophobic surfaces featuring a single macroscopic slot.We systematically examine the effects of the dimensionless slot width(the ratio of the actual slot width to the initial droplet diameter,0.09-0.54)and the Weber number(4.03-36.59)on droplet spreading,retraction,penetration,and fragmentation.Four characteristic regimes are observed—complete rebound,rebound with partial penetration,fragmentation with partial penetration,and full penetration—and their corresponding parameter maps are constructed.The maximum spreading diameter decreases progressively as the slot width increases.By accounting for both the slot width and liquid penetration height,a modified theoretical model is developed to predict the maximum spreading coefficient as a function of the Weber number,achieving great agreement with experimental measurements.Moreover,partial liquid penetration during impact reduces the effective mass involved in spreading and retraction,leading to a significant reduction in the droplet-surface contact time.关键词
液滴碰撞/超疏水表面/单一狭缝/最大铺展系数/接触时间Key words
drop impact/superhydrophobic surface/single slot/maximum spreading coefficient/contact time分类
数理科学引用本文复制引用
周莹,卢孝勇,朱平安..液滴撞击超疏水单狭缝表面的实验研究[J].实验流体力学,2026,40(4):130-137,8.基金项目
国家自然科学基金项目(12522212) （12522212）
香港研究资助局项目(11214625) （11214625）
深圳市科技计划项目(JCYJ20250604184531040) （JCYJ20250604184531040）
