Water-Droplet Impact and Sliding Behaviors on Slippery Surfaces with Various Weber Numbers and Surface Inclinations

The dynamic behaviors of water droplets on a slippery surface are significant to practical anti-icing applications. Herein, the impact and sliding behavior lubricant-infused surfaces (LISs) were investigated with high-speed camera. LISs prepared by infusing perfluoropolyether oils into anodized porous surfaces. results show that maximum spreading diameter retraction velocity droplet increased We number. For LIS-100, factor at 2.5 ms from 2.00 3.88 increasing 30 267. Low-viscosity lubricant facilitated speed rebound surface, while high-viscosity contributed stability LIS. Additionally, high inclination angle (θ) rapid shedding surface. rapidly 1.04 4.66 mm/s θ 15° 45°. LIS low-viscosity had velocity, LIS-100 was about seven times faster than LIS-104. This work reveals impacting law provides useful information for design under drop conditions.