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 journalArticlepeer-review

7 Scopus citations


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
Issue number4
StatePublished - Jan 27 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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