Abstract:  In this paper, the drag and acceleration motions of droplets have been achieved by using electrostatic induction. By studying the velocity of the droplet motion, the friction coefficient between the droplet and the substrate is obtained as 0.008, as well as the viscous coefficient between the droplet and the surrounding is 0.028 kg/(m·s). Moreover, the electric field force on the droplet and the process of the droplet's motion are calculated by numerical simulations. At 400 V, the droplet firstly accelerates and then decelerates, and stops moving under the tip electrode. At 1000 V, the droplet accelerates dramatically and touches the tip electrode. The simulations are in good agreement with that of experiments.

Key words: electrostatic induction, droplet, horizontal motion, numerical simulation