Amplitudes of free bubble oscillations in liquids

Abstract In the paper a classification of freely oscillating bubbles is given, methods for evaluating experimental data in research on bubble dynamics are reviewed, and data on bubble oscillation amplitudes, as obtained by analyses of all the accessible experiments (amplitude is defined as the ratio of the maximum to the equilibrium radius of a bubble), is summarized. This shows that the amplitude range of real bubble oscillations is rather limited. This finding, among others, validates the use of simple bubble models for most situations of interest in bubble dynamics research. A comparison with the findings of other workers shows a close correspondence. Finally, suggestions for further research are given.

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