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Ultrasonic Separation of Suspended Particles - Part I: Fundamentals

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Separation of suspended particles by means of acoustic forces is a promising alternative to conventional technologies. This paper concerns some of the latest developments of separation devices based on piezoelectric resonators. The acoustic forces on particles suspended in a liquid are reviewed. A mathematical model for the description of layered piezoelectric resonators is extended and applied to the calculation of the electrical properties and the acoustic field quantities of the resonator. A resonator for particle separation is analyzed and the optimum operating frequency range with respect to resonator efficiency (performance number) is determined. It is found that efficiency depends strongly on the frequency and the properties of the suspension. Results are in good agreement with experimental data and with a different approach based on perturbation theory.

Document Type: Research Article

Publication date: May 1, 1998

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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