Experimental and theoretical investigation of microstreaming generated by a cavitation bubble undergoing nonspherical oscillations

International audienceA microbubble of a given size and submitted to an acoustic field may undergo axisymmetric nonspherical oscillations for sufficiently large acoustic amplitudes. These nonspherical oscillations, in addition to the radial and possibly translational oscillations, will generate in the bubble vicinity a flow called microstreaming. Cavitation microstreaming is of peculiar importance in engineering (micromixing) and biomedical fields (shear stress applied to cell and tissues). A current challenge is to predict and control the microstreaming pattern and velocity field induced by a bubble with known oscillatory dynamics