Liquid jet directionality and droplet behavior during emulsification of two liquids due to acoustic cavitation

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The present study numerically investigates liquid-jet characteristics of acoustic cavitation during emulsification in water/gallium/air and water/silicone oil/air systems. It is found that a high-speed liquid jet is generated when acoustic cavitation occurs near a minute droplet of one liquid in another. The velocity of liquid jet significantly depends on the ultrasonic pressure monotonically increasing as the pressure amplitude increases. Also, the initial distance between cavitation bubble and liquid droplet affects the jet velocity significantly. The results revealed that the velocity takes maximum values when the initial distance between the droplet and cavitation bubble is moderate. Surprisingly, the liquid jet direction was found to depend on the droplet properties. Specifically, the direction of liquid jet is toward the droplet in the case of water/gallium/air system, and vice versa the jet is directed from the droplet in the case of water/silicone oil/air system. The jet directionality can be explained by location of the high-pressure spot generated during the bubble contraction.

Original languageEnglish
Article number104874
JournalUltrasonics Sonochemistry
Publication statusPublished - 2020 Apr


  • Acoustic cavitation
  • Emulsification
  • Non-linear oscillation
  • OpenFOAM
  • Three-Phases Volume of Fluid (TP-VOF) method

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry


Dive into the research topics of 'Liquid jet directionality and droplet behavior during emulsification of two liquids due to acoustic cavitation'. Together they form a unique fingerprint.

Cite this