Microbubble shape oscillations excited through ultrasonic parametric driving

Michel Versluis, David E. Goertz, Peggy Palanchon, Ivo L. Heitman, Sander M. van der Meer, Benjamin Dollet, Nico de Jong, Detlef Lohse

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130 Citations (Scopus)
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An air bubble driven by ultrasound can become shape-unstable through a parametric instability. We report time-resolved optical observations of shape oscillations (mode n=2 to 6) of micron-sized single air bubbles. The observed mode number n was found to be linearly related to the ambient radius of the bubble. Above the critical driving pressure threshold for shape oscillations, which is minimal at the resonance of the volumetric radial mode, the observed mode number n is independent of the forcing pressure amplitude. The microbubble shape oscillations were also analyzed numerically by introducing a small nonspherical linear perturbation to a Rayleigh-Plesset-type equation, capturing the experimental observations in detail.
Original languageEnglish
Article number026321
Number of pages6
JournalPhysical review E: Statistical, nonlinear, and soft matter physics
Issue number2
Publication statusPublished - 2010


  • IR-79249
  • METIS-267749


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