Mechanisms of rebound suppression of oil‐in‐water emulsion droplet on superhydrophobic surface

The suppression of droplet rebounding is governed by a wetting-induced energy dissipation mechanism. Surface wetting increases the contact area between the droplet and the surface, which enhances frictional resistance and energy dissipation. The maximum spreading velocity and coefficient of droplets increase with impact velocity and droplet diameter; accordingly, greater shear gradients and wetted areas lead to higher viscous dissipation and frictional energy loss. Furthermore, larger droplet diameter and higher impact velocity reduce the droplet's resistance to deformation and breakup, resulting in satellite droplets separation and therefore greater energy loss.