| 초록 |
A droplet contact charging phenomenon has been studied as novel microfluidics research subject. We have tried to study the fundamental charge transfer mechanism of this interesting phenomenon and found some charging differences between positive and negative charging behaviors. However, related researches about that are not studied well. So, we needed to develop a numerical model the electrostatic analysis of the droplet contact charging phenomenon. In this work, we assume the charging differences result from electrostatic environments of our system and the result of numerical analysis proves our assumption. Also, the charge amount of a droplet is calculated by applying constant electric potentials on surrounding structures using the electrostatic module in COMSOL Multiphysics. Throughout the numerical analysis, we developed numerical model simulating the same charging differences with experimental result and found that applied electric potentials change according to electrostatic environments. Our numerical model will helps to understand how much the droplet contact charging system is sensitive to surrounding electrostatic environment. |
