Nanodroplet Coalescence and Jumping Dynamics: A Molecular Dynamics Approach

Coalescence-induced droplet jumping is a phenomenon with significant implications for various applications, including surface design and fluid dynamics. In this study, we investigate the jumping behavior of nanodroplets on soft surfaces using molecular dynamics simulations. When two identical droplets come into contact, a liquid bridge forms, and the coalescence process progresses as this bridge grows over time. The dynamics of droplet jumping are governed by the interplay between surface adhesion forces and substrate wettability. Through analysis of interfacial energy, forces in the z-direction, and droplet velocities, we determine key parameters such as coalescence time and the moment of detachment. These insights provide valuable tools for designing surfaces optimized for enhanced droplet jumping. Notably, the study identifies an optimal surface energy that maximizes coalescence-induced jumping, emphasizing the critical role of substrate properties in influencing droplet dynamics.

کلیدواژه ها:

Wetting ، Nanodroplets ، Coalescence-Induced Jumping ، Surface Energy ، Molecular Dynamics Simulation