Analysis of Droplets Spreading on Periodic Plasma Surface

Abstract

This paper presents the unique spreading process of droplet on dielectric barrier discharge (DBD) actuator periodic plasma surface. High-speed camera is used to capture the droplet spreading process. We use image processing to handle the massive droplets image data. Results show that droplets have more spreading time and much less oscillation cycles on periodic plasma surface, and the spreading diameter is larger while the apex height is lower. Furthermore, the effect of periodic plasma density is studied. And it is revealed that when plasma density increases in certain density range, the maximum and final spreading diameters increase, while the apex height of droplet in stabilization phase decreases.