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Ice nucleation of water droplet containing solid particles under weak ultrasonic vibration
•Ice nucleation in fine water droplets triggered by weak ultrasonic vibrations.•Ice nucleation onset sites sit between the particle and the vibrating substrate.•The collapse of cavitation bubbles in the particle crevice is structure sensitive. Water with small volume (a few microlitres or less) ofte...
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Published in: | Ultrasonics sonochemistry 2021-01, Vol.70, p.105301-105301, Article 105301 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •Ice nucleation in fine water droplets triggered by weak ultrasonic vibrations.•Ice nucleation onset sites sit between the particle and the vibrating substrate.•The collapse of cavitation bubbles in the particle crevice is structure sensitive.
Water with small volume (a few microlitres or less) often maintains its liquid state even at temperatures much lower than 0 °C. In this study, we examine the onset of ice nucleation in micro-sized water droplets with immersed solid particles under weak ultrasonic vibrations. The experimental results show that ice nucleation inside the water droplets can be successfully induced at relatively high temperatures. The experimental observations indicate that the nucleation sites are commonly encountered in the region between the particle and the substrate. A numerical study is conducted to gain insight into the possible underlying phenomenon for ice nucleation in such systems. The simulation results show that the collapse of cavitation bubbles in the crevice at the particle surface is structure sensitive with the hemisphere-shape crevice generating pressures as high as 1.63 GPa, which is theoretically suitable for inducing ice nucleation. |
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ISSN: | 1350-4177 1873-2828 |
DOI: | 10.1016/j.ultsonch.2020.105301 |