Abstract
Efficiency of ultrasonic atomization can be enhanced by using a horn, where the sound pressure amplitude increases. In the present paper, the effects of a horn on the atomization rate and the sound field have been evaluated by changing the tip diameter of the horn. As a result, by decreasing the horn tip diameter, the maximum sound pressure became higher, but it was revealed that the high sound pressure was limited to the interior of the horn and the very small region near the horn tip because of the diffraction of the sound wave.
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