Abstract:It is of great significance to carry out the interfacial evolution phenomenon of droplets impacting tip-raised structures, which is widely existing in nature and industrial applications. The dynamic evolution of the interface during droplet impact on superhydrophobic cone was investigated by combining experiments and numerical simulations, focusing on the effects of Weber number We and cone angle α on the modal evolution of the droplet on the surface of the cone, and the reasons for the mode switching were analyzed in the context of the velocity field and pressure field. The research finds that as We increases, four modes will occur successively when the droplet impacts the cone: unpunctured and completely rebound; punctured to form a ring and then completely rebound; punctured to form a ring and shattered in the process of retraction; punctured to form a ring and shattered in the process of spreading. Furthermore, as α increases, it is found that the critical We for switching between different modes gradually increases. This research work not only enhances the understanding of the impact behavior of droplets on complex surfaces, but also provides an important reference for guiding related engineering applications.