2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Aifantis E, Wang H, Zhu T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 190 pages |
| ISBN: | 978-1-987820-48-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Droplet-to-bubble transition: A tornado in ultrasound
Duyang Zang1;1, Xi'an, China;
Type of Paper: Regular
Id Paper: 306
Topic: 1
Abstract:
In this talk, we investigated bubble formation via acoustic levitation, during which a levitated droplet evolves from an oblate spheroidal shape to a flattened, thin bowl-shaped membrane, eventually forming a closed bubble. Through systematic experimentation and theoretical analysis, we demonstrated that the buckled geometry of the liquid membrane can drastically enhance the suction effect at the membrane rim, forming a significant pressure gradient inside the membrane which causes an abrupt area expansion and bubble formation. The insights presented here shed light on the acoustic manipulation and curving of other fluid/fluid interfaces, providing a reference for fabricating unique soft materials such as anti-bubbles and liquid onions.