Ultrasonic nozzle

<p>Ultrasonic nozzles are a type of <a href="/facts/Spray_nozzle/xlvwoAoM">spray nozzle</a> that use high frequency <a href="/facts/Vibration/sGgDqG71">vibrations</a> produced by <a href="/facts/Piezoelectricity/65k6BDqx">piezoelectric</a> <a href="/facts/Transducer/YS7zfv9d">transducers</a> acting upon the nozzle tip that create <a href="/facts/Capillary_waves/KnCg8GAg">capillary waves</a> in a liquid film.  Once the <a href="/facts/Amplitude/aEckuXJM">amplitude</a> of the capillary waves reaches a critical height (due to the power level supplied by the generator), they become too tall to support themselves and tiny droplets fall off the tip of each wave resulting in <a href="/facts/Aerosol/X1jXFLp2">atomization</a>.
</p><p>The primary factors influencing the initial droplet size produced are <a href="/facts/Frequency/QUSbPaW8">frequency</a> of vibration, <a href="/facts/Surface_tension/EuluYmSM">surface tension</a>, and <a href="/facts/Viscosity/QLVfrdCz">viscosity</a> of the liquid. Frequencies are commonly in the range of 20–180 kHz, beyond the range of human hearing, where the highest frequencies produce the smallest drop size.
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Ultrasonic nozzle open-in-new

Ultrasonic nozzle