Multiscale perspective on wetting on switchable substrates: Mapping between microscopic and mesoscopic models

Abstract

We present a general mapping approach between the microscopic molecular dynamics model and a mesoscopic model based on the thin-film equation for the description of the dynamics of droplets on partially-wettable, switchable substrates. We apply the mapping approach to the adaption of a droplet to a new wettability upon switching and the coalescence of two droplets making the first step toward quantitative comparisons of dynamics between models acting on mesoscopic and microscopic scales.