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Investigation and Visualisation of Ultrasonic Agglomeration of Gas Bubbles in Liquid

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The experimental and theoretical studies of acoustic agglomeration of gas bubbles in the liquid have become a new focus in ultrasonic fundamental research. The interaction of ultrasonic waves with dispersions can be used for separating the gas bubbles from the liquid (under the threshold of the cavitation). The ultrasonic agglomeration mechanisms are very complex processes and their theoretical descriptions are not completely established. Many mechanisms have been proposed to explain an agglomeration of gas bubbles in an ultrasonic field. Presented work suggests that only radiation pressure should be taken into account as a mechanism of drifting in this problem. The results of the experiments are compared to the theoretical studies and good agreement can be shown between the investigations. It would be necessary to conduct experimental studies to visualise the behaviour developed by the gas bubbles during an ultrasonic agglomeration. It presents a method of the visualisation the trajectories described by the gas bubbles during the agglomeration process. Their trajectories vary sinusoidally by the action of the ultrasonic field. The visualisation setup is presented.
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Document Type: Research Article

Publication date: 2002-09-01

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  • 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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