Robert Mettin: abstract acp

## Experimental and theoretical bubble dynamics

W. Lauterborn, T. Kurz, R. Mettin, and C.-D. Ohl

Drittes Physikalisches Institut, Universität Göttingen,
Bürgerstraße 42-44, D-37073 Göttingen, Germany

#### Introduction

Bubble dynamics lies at the heart of many a phenomenon in physics, chemistry, biology, and medicine. Moreover, the knowledge of bubble behavior may foster technical applications in many areas from pumps and pipelines, propellers and hydrofoils to cooling systems and chemical reactions. The importance of bubble dynamics was first noticed with respect to ship propellers and given a theoretical description, pertaining to single, spherical bubbles, by Rayleigh. Since then, the interest in bubbles and their dynamics has constantly grown, albeit not on too fast a pace, because of difficulties in making, handling, and controlling them, and in following their at times exceedingly fast dynamics. These days, bubbles have become a fashionable subject of investigation because many of the former limitations have ceased. In particular, techniques of working with isolated single bubbles have been developed that make possible detailed studies of bubble life down to the picosecond time scale. Bubbles in liquids can be formed in a variety of ways. They may come off a wall in liquids oversaturated with some gas as in beer or champaign. These are soft" bubbles usually not doing any harm unless formed in blood by depressurization as it may happen in diver emergency cases. But they can also be forced to appear by tearing the liquid with brute force. This type of bubble formation is called cavitation and the bubbles are termed {\it cavitation bubbles}, because, when formed by rupture of a liquid, they are essentially empty, i.e. just cavities. Later in their life they may fill with vapor and gas to become soft bubbles. However, when driven into large excursions they may acquire a state of relative emptiness preparing them for rapid collapse with all the strange effects of shock wave and light radiation. These strong" bubbles that clean and desinfect water, destroy the hardest materials, and initiate or enhance chemical reactions are the scope of the present chapter.
(...)

in: I. Prigogine and S.A. Rice (eds.):
Advances in Chemical Physics 110, pp. 295-380,
John Wiley & Sons, New York (1999).

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