Atomization of acoustically levitated droplet exposed to hot gases

Yanju Wei, Yajing Yang, Jie Zhang, Shengcai Deng, Shenghua Liu, Chung K. Law, Abhishek Saha

Research output: Contribution to journalArticle

Abstract

We, herein, report a fatal instability in an acoustically levitated droplet when exposed to hot product gases of a flame. The initially stable millimeter size droplets were observed to undergo a critical deformation and, subsequently, strong and continuous equatorial atomization, in the form of daughter droplets with a diameter less than 100 μm. Subsequent analysis using a numerical simulation have shown that such thermally induced atomization is caused by dramatic changes in the acoustic pressure around the evaporating droplet due to the presence of a large amount of binary molecules, a critical aspect which was not accounted for in previous analyses of such instabilities.

Original languageEnglish (US)
Article number044101
JournalApplied Physics Letters
Volume116
Issue number4
DOIs
StatePublished - Jan 27 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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  • Cite this

    Wei, Y., Yang, Y., Zhang, J., Deng, S., Liu, S., Law, C. K., & Saha, A. (2020). Atomization of acoustically levitated droplet exposed to hot gases. Applied Physics Letters, 116(4), [044101]. https://doi.org/10.1063/1.5139539