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Oscillations of Bubbles Generated by Imploding and Exploding Hollow Glass Spheres in Liquids

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Experimental data found in the literature on oscillations of bubbles generated by imploding and exploding hollow glass spheres in liquids are used to estimate oscillation intensities and the partition of energies in these bubbles. It is found that in the experimental bubbles, in contrast to a theoretical model, excessive dissipation of energy occurs which greatly reduces the intensity of oscillations. The cause of increased energy dissipation and decreased intensity of oscillations is seen in the wall distortion due to glass fragments surrounding the bubble. A distortion factor is introduced to describe the degree of the bubble wall deformation.

Zusammenfassung

Unter Benutzung experimenteller Literaturdaten über die Schwingungen von Blasen, die durch implodierende und explodierende Glashohlkugeln in Flüssigkeiten entstehen, werden die Schwingungsintensitäten und die Energieaufteilung in den Blasen abgeschätzt. Es zeigt sich, daß in den experimentellen Blasen eine im Vergleich zu theoretischen Vorhersagen außergewöhnlich hohe Energiedissipation auftritt, welche die Intensität der Schwingungen stark vermindern. Der Grund für die erhöhte Energiedissipation und die verminderte Intensität der Schwingungen wird in der Verzerrung der Blasenwand durch Glasfragmente gesehen, welche die Blasen umgeben. Zur Kennzeichnung der Blasendeformation wird ein Verzerrungsfaktor eingeführt.

Sommaire

A partir de données expérimentales déjà publées concernant les oscillations de bulles engendrées par implosion ou explosion de sphères de verre creuses dans divers liquides, on a effectué des estimations des intensités d'oscillation et de la répartition de l'énergie dans les bulles. Contrairement à un certain modèle théorique, l'analyse des expériences met en évidence un excès de dissipation d'énergie qui se traduit par une réduction rapide de l'amplitude d'oscillation. La cause commune de cette dissipation énergétique accrue et de la décroissance rapide des oscillations est attribuée à la presence de débries de verre sur la paroi de la bulle. On a done introduit un facteur de distorsion de paroi pour décrire le degré de déformation de la paroi de la bulle.
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Document Type: Research Article

Publication date: June 1, 1989

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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