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Zur translatorischen Bewegung einer nichtlinear schwingenden Gasblase in einer kompressiblen Flüssigkeit in Anwesenheit eines inhomogenen Ultraschallfeldes

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The motion of a nonlinear oscillating gas bubble in a compressible fluid in the presence of an inhomogeneous sound field is investigated. Three differential equations describe the radial pulsations and the translational motion of the gas bubble in a standing acoustic sound field. The numerical solution of the differential equation system shows that the bubble besides performing radial oscillations has a strong translation motion in the liquid. The mean parameter is the ratio of frequency of the ultrasonic field. Spezial effects are discussed.

Zusammenfassung

Die Bewegung einer nichtlinear schwingenden Gasblase in einem inhomogenen Ultraschallfeld in einer kompressiblen Flüssigkeit wird untersucht. Drei Differentialgleichungen beschreiben die radiale Pulsation und die translatorische Bewegung der Gasblase in einem stehenden akustischen Feld. Die numerische Lösung dieses Differentialgleichungssystems zeigt, daß die Blase neben den Radialschwingungen sich unterschiedlich stark in der Flüssigkeit bewegen kann. Der entscheidende Parameter ist das Frequenzverhältnis des angelegten Ultraschallfeldes. Spezielle Effekte werden ausführlich diskutiert.

Sommaire

On examine le mouvement non-linéaire vibratoire d'une bulle dans un liquide compressible sous l'influence d'un champ ultrasonique inhomogène. Trois équations différentielles décrivent la pulsation radiale de la bulle et son mouvement de translation dans un champ acoustique stationnaire. La résolution numérique de ces équations montre que la bulle, à part ses vibrations radiales, peut se déplacer d'une manière notable dans le liquide. Le paramètre décisif est la fréquence relative des ultrasons appliqués. Des effets spécifiques sont discutés en détail.
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Document Type: Research Article

Publication date: February 1, 1980

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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