超声波激励疏水表面液滴运动的实验研究

An anti-frosting strategy using ultrasonic wave and hydrophobic surface to drive droplets is proposed. The transport behavior of droplets on the aluminum plate surface under ultrasonic excitation is studied experimentally. The effects of ultrasonic power, droplet volume and surface hydrophobicity on the diameter spreading rate, average velocity of droplet are analyzed. The results show that the droplet undergoes four stages of spreading deformation-motion-atomization-evaporation under the action of ultrasonic wave. The droplet diameter spreading rate increases with the increase of ultrasonic power, but the droplet volume has no significant effect on it. The average velocity is positively correlated with ultrasonic power and droplet volume. Compared with the bare aluminum surface, the diameter spreading rate of droplet on the hydrophobic surface increased to about 1.15 times, and the average velocity increased to about 6 times.