Subharmonic spherical bubble oscillations induced by parametric surface modes

Matthieu Guedra (1) , Sarah Cleve (2) , Cyril Mauger (2) , Claude Inserra (1)

1 LabTAU - Application des ultrasons à la thérapie
2 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique

A potential source of subharmonic bubble emissions is revealed experimentally by high-speed imaging. When an acoustic bubble is driven at sufficiently large pressure amplitudes, energy transfer from surface to volume oscillations can lead to the triggering of subharmonic spherical oscillations. This experimental evidence is in agreement with recent theoretical modeling of nonspherical bubble dynamics accounting for nonlinear mode coupling. Implications for the monitoring of stable cavitation activity are discussed.

Domaines: Sciences de l'ingénieur [physics]

Matthieu Guedra, Sarah Cleve, Cyril Mauger, Claude Inserra. Subharmonic spherical bubble oscillations induced by parametric surface modes. Physical Review E , 2020, 101, ⟨10.1103/PhysRevE.101.011101⟩. ⟨hal-02456992⟩