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Updated: Oct 20, 2025

High Throughput Analysis of Liquid Droplet Impacts
Published on: March 6, 2020
Rebound Behaviors of Multiple Droplets Simultaneously Impacting a Superhydrophobic Surface
Shu-Rong Gao1,2, Jia-Xin Jin1,2, Bo-Jian Wei1,2
1Research Center of Engineering Thermophysics, North China Electric Power University, Beijing 102206, China.
Abstract:
The rebound behaviors of multiple droplets simultaneously impacting a superhydrophobic surface were investigated via lattice Boltzmann method (LBM) simulations. Three rebound regions were identified, i.e., an edge-dominating region, a center-dominating region, and an independent rebound region. The occurrence of the rebound regions strongly depends on the droplet spacing and the associated Weber and Reynolds numbers. Three new rebound morphologies, i.e., a pin-shaped morphology, a downward comb-shaped morphology, and an upward comb-shaped morphology, were presented. Intriguingly, in the edge-dominating region, the central droplets experience a secondary wetting process to significantly prolong the contact time. However, in the center-dominating region, the contact time is dramatically shortened because of the strong interactions generated by the central droplets and the central ridges. These findings provide useful information for practical applications such as self-cleaning, anticorrosion, anti-icing, and so forth.
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