Dynamic Effects Induced Transition of Droplets on Biomimetic Superhydrophobic Surfaces

Superhydrophobic surfaces have considerable technological potential for various applications because of their extreme water-repel tent properties. Dynamic effects, such as the bouncing and vibration of a droplet, can destroy the composite solid-air-liquid interface. The impact pressure of a bouncing droplet and the inertia force of it vibrating droplet affect the transition from it solid-air-liquid interface to it solid-liquid interface, Therefore, it is necessary to study the dynamic effect of droplets under various system parameters (impact velocity and frequency and amplitude of vibration). A new model for the prediction of the wetting and dewetting process during droplet vibration based on the relationship between the adhesion force and the inertia force of a droplet is proposed. To investigate whether micro-, nano-, and hierarchical structures can resist the destabilizing factors responsible for the transition, a study of bouncing and vibration of a water droplet is systematically conducted oil various surfaces. The physics of wetting, phenomena for, water droplet Studies is of fundamental importance in the geometrical design Of superhydrophobic surfaces.