Inducing drop to bubble transformation via resonance in ultrasound

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

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.

Citation

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), Article 3546. https://doi.org/10.1038/s41467-018-05949-0

• Journal Article Type: Article
• Acceptance Date: Aug 6, 2018
• Online Publication Date: Sep 11, 2018
• Publication Date: Dec 1, 2018
• Deposit Date: Sep 18, 2018
• Publicly Available Date: Sep 18, 2018
• Journal: Nature Communications
• Electronic ISSN: 2041-1723
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 1
• Article Number: 3546
• DOI: https://doi.org/10.1038/s41467-018-05949-0
• Keywords: General Biochemistry, Genetics and Molecular Biology; General Physics and Astronomy; General Chemistry
• Public URL: https://hull-repository.worktribe.com/output/1056067
• Publisher URL: https://www.nature.com/articles/s41467-018-05949-0
• Contract Date: Sep 18, 2018