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)
CD-SIPS2016_Volume1
CD shopping page

    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.

    Keywords:

    Instabilities; Surface;

    Cite this article as:

    Zang D. Droplet-to-bubble transition: A tornado in ultrasound. In: Kongoli F, Aifantis E, Wang H, Zhu T, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics. Volume 7. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 127-128.