How Does Ultrasonic Spray Coating Work?
Ultrasonic nozzles use very high frequency vibration instead of high pressure or compressed air to produce extremely small and uniform droplets.
Capillary waves are produced on the surface of a liquid on a vibrating surface.
During atomization, capillary waves are transformed by increasing the amplitude until the peak of the wave forms droplets.
The wavelength, and subsequently the droplet size, are determined by vibration frequency. High vibration frequency generates fine droplets, and low vibration frequency generates coarse droplets.
