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ACOUSTIC - INDUCED TURBULENCE IN BUBBLES

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Air bubble interface dynamics are considered and subjected to acoustic forcing. The bubbles are generated in a tank of water and subjected to variable frequency sound. High-speed video (in excess of 1000 fps) recording of the onset and subsequent surface wave dynamics reveals complex pinching and release of micro-bubbles, both external and internal to the main bubble. The acoustic signature reveals complex frequency interaction; feedback control of these frequencies is proposed using a novel method.

Author(s):

Frank Secretain    
Queen's University
Canada

Andrew Pollard    
Queen's University
Canada

Brian Milne    
Queen's University
Canada