Abstract
In order to confirm the effect of ultrasonic waves on freezing of supercooled water, various levels of ultrasonic waves were applied to supercooled water. The frequencies of the waves applied were 28 kHz, 40 kHz, 45 kHz, 50 kHz, and 1 MHz. In order to clarify the mechanism of the effect of the ultrasonic waves, several experimental conditions were selected and the results were compared. Each test section was cooled at a constant cooling rate, and the ultrasonic waves were continuously applied to all test sections, varying the frequency and the intensity. It was found that the existence of a free surface touching a metal bar with an addition of ultrasonic waves has an effect on freezing of supercooled water.
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