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Modelling of Spherical Gas Bubble Oscillations and SonoluminescenceThe discovery of single-bubble sonoluminescence has led to a renewed interest in the forced radial oscillations of gas bubbles. Many of the more recent studies devoted to this topic have used several simplifications in the modelling, and in particular in accounting for liquid compressibility and thermal processes in the bubble. In this paper the significance of these simplifications is explored by contrasting the results of Lohse and co-workers with those of a more detailed model. It is found that, even though there may be little apparent difference between the radius-versus time behaviour of the bubble as predicted by the two models, quantities such as the spherical stability boundary and the threshold for rectified diffusion are affected in a quantitatively significant way. These effects are a manifestation of the subtle dependence upon dissipative processes of the phase of radial motion with respect to the driving sound field. The parameter space region, where according to the theory of Lohse and co-workers, sonoluminescence should be observable, is recalculated with the new model and is found to be enlarged with respect to the earlier estimate. The dependence of this parameter region on sound frequency is also illustrated.
Document ID
20020086898
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Prosperetti, A. (Johns Hopkins Univ. Baltimore, MD United States)
Hao, Y. (Johns Hopkins Univ. Baltimore, MD United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Philosophical Transactions of the Royal Society of London A
Volume: 357
Subject Category
Fluid Mechanics and Thermodynamics
Distribution Limits
Public
Copyright
Other