微細液滴-固体壁面間に働く摩擦力の流路幅依存性に関する分子論的研究

Abstract

We report the channel size dependence of the forces that act on water droplets in a nano-meter order channel. Considering the several different-sized channel models, we evaluate forces between the two hydrophobic walls and water droplets by molecular dynamics simulation and show the channel size dependence in terms of the mechanical coefficients, such as friction coefficient. As a result, we show that the friction coefficient depends on the channel size due to the normal pressure. From these results, we clarify that there is the different channel size dependence of the static and dynamic properties of the water droplet compared with the macroscopic case.