Abstract

Oscillations of gas bubbles in a liquid are studied using a shock tube. Beside observing the bubble wall motion with the help of a camera, a pressure wave field in the liquid is investigated in detail. The rise time of the driving pressure step turns out to be rather large. This pressure step is also accompanied by a precursor whose origin is still unclear. The waves propagating into the liquid behind the pressure step appear to be strongly disturbed; clean waveforms can be obtained only in the immediate vicinity of the bubble. Examples of several waveforms recorded this way are presented.

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