| Zugriffsnummer | 47554 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Deutsch |
| Titel | Zur Dynamik und Schallabstrahlung kugelförmiger Kavitationsblasen in einem Schallfeld |
| Autor(in); Institution |
Cramer, Eckehart; 9.41, Biosignalverarbeitung, PTB-Berlin
Lauterborn, W.; Drittes Physikalisches Institut, Universität Göttingen, Göttingern, GERMANY
|
| Quelle/Jahr | Acustica: 49 (1981), 3, 226 - 238 |
| ISSN | 1436-7947 |
| Verlag | Stuttgart: Hirzel |
| Zusammenfassung | A model equation describing spherically symmetric oscillations of cavitation bubbles driven by a sound field is solved numerically for a set of parameters of practical interest. The model takes into account surface tension and damping of the oscillations by viscosity and sound radiation. The radiated sound waves are also calculated. They can be viewed as the elementary events making up the cavitation noise. Resonance curves are given showing the response of a bubble at different frequencies of the driving sound field and the response of bubbles of different sizes at a fixed frequency of the sound field. The periodic oscillations of the bubble wall, the corresponding amplitude and phase spectra, as well as the sound pressure distribution in the surrounding liquid, are plotted for some typical cases. Some examples are given of the threshold behaviour of ultraharmonic components, found in the amplitude spectrum of the bubble wall motion. A comparison with solutions of a simpler bubble model for an incompressible liquid shows the advantage of the model used here in the cases of large amplitudes of the oscillations and of large bubbles. |
