Experimental observation of acoustic streaming in cavitation bubble fields

Till Nowak , Robert Mettin

We use a special fluorescence microscope setup with simultaneously high speed recordings and particle tracking velocimetry to observe streaming in acoustic bubble fields. One point of interest is to correlate the streaming and bubble motion. It is well known that bubble motion can cause streaming and bubble translation and nucleation are impacted by streaming. By applying a static over pressure it is possible to prevent cavitation and observe the pure acoustic streaming. We show observations of different sound fields with different frequencies thus also different bubble structures. Partially the camera observations are compared with electrochemical measurements to see the streaming inside the boundary layer.

Mots clés: acoustic streaming; cavitation

Domaines: Acoustique [physics.class-ph]

Till Nowak, Robert Mettin. Experimental observation of acoustic streaming in cavitation bubble fields. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810916⟩