Abstract
The effects of ultrasonic vibrations on the melting process of phase change material (PCM) in a rectangular vessel were experimentally investigated. A constant heat flux from a vertical heating plate was provided to the PCM. Ultrasonic vibrations were applied through a bottom plate of the enclosure. Three different heat fluxes and various ultrasonic frequencies in the range of 15 to 55 KHz were tested. The heat transfer coefficients on the heating plate, the solid-liquid interface shape, and the temperature distributions in the PCM during a complete melting process were measured at various experimental conditions. The results show that the overall melting phenomena was significantly affected by the ultrasonic vibrations and the change in frequency of the ultrasonic waves.
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