Inducing drop to bubble transformation via resonance in ultrasound

Duyang Zang, Lin Li, Wenli Di, Zehui Zhang, Changlin Ding, Zhen Chen, Wei Shen, Bernard P. Binks, Xingguo Geng

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)

Abstract

Bubble formation plays an important role in industries concerned with mineral flotation, food, cosmetics, and materials, which requires additional energy to produce the liquid–gas interfaces. A naturally observed fact is, owing to the effect of surface tension, a bubble film tends to retract to reduce its surface area. Here we show a “reverse” phenomenon whereby a drop is transformed into a bubble using acoustic levitation via acoustic resonance. Once the volume of the cavity encapsulated by the buckled film reaches a critical value V*, resonance occurs and an abrupt inflation is triggered, leading to the formation of a closed bubble. Experiments and simulations both reveal that V* decreases with increasing acoustic frequency, which agrees well with acoustic resonance theory. The results afford enlightening insights into acoustic resonance and highlight its role in manipulating buckled fluid–fluid interfaces, providing a reference for fabricating unique core–shell-like materials.

Original languageEnglish
Article number3546
Number of pages7
JournalNature Communications
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

Cite this

Zang, D., Li, L., Di, W., Zhang, Z., Ding, C., Chen, Z., Shen, W., Binks, B. P., & Geng, X. (2018). Inducing drop to bubble transformation via resonance in ultrasound. Nature Communications, 9(1), [3546]. https://doi.org/10.1038/s41467-018-05949-0