Investigation of Coalescence-Induced Droplet Jumping on Mixed-Wettability Superhydrophobic Surfaces

Coalescence-induced droplet jumping has received more attention recently, because of its potential applications in condensation heat transfer enhancement, anti-icing and self-cleaning, etc. In this paper, the molecular dynamics simulation method is applied to study coalescence-induced two nanodroplets with equal size on surfaces periodic strip-like wettability patterns. The results show that strip width, contact angle relative position center droplets are all related velocity, velocity mixed-wettability superhydrophobic can exceed one perfect surface a 180° appropriately designed surfaces. Moreover, larger both width difference are, higher is, when hydrophilic fixed, becomes increase hydrophobic strip, which contrary trend fixing altering other width.