Viscous streaming from surface waves on the wall of acoustically-driven gas bubbles

Microstreaming which is induced when a single bubble is driven acoustically in the regime of parametric generation of Faraday waves is studied. The greater wall displacement amplitudes for n>1 modes mean that their effect on the flux of species in the liquid can be much greater than that of the breathing mode. It has been shown that the acoustical streaming from a bubble undergoing axi-symmetric surface wave oscillations is enhanced in comparison with lateral oscillations. This study was initiated by the observations of bubble oscillation by electrochemical sensing technique. Now we can quantitatively evaluate the magnitude of the measured currents and its relation to the optically detected amplitudes of bubble oscillations.