Temperature Effects on the Propagation of Transient Ultrasonic Waves in Viscous Fluids
Abstract:The purpose of the present work is to study the propagation phenomenon of transient ultrasonic waves in viscous fluids submitted to temperature variations. Laplace transform is used in order to obtain a solution to the propagation equation of acoustic waves in viscous fluids. This solution is expressed under the form of a convolution product between the pressure at the output of the transmitting transducer and a function, depending on time and position, called the impulse response of the propagation filter. This impulse response depends upon the propagation medium viscosity which varies with temperature. It is considered that the volume viscosity coefficient is governed by a law similar to Andrade's formulae; this assumption is validated by experimental results with a quite good accuracy.
Document Type: Research Article
Publication date: 2008-01-01
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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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