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Ultrasonic Relaxation in Chlorocyclohexane

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Ultrasonic relaxation behaviour in chlorocyclohexane has been studied using two independent ultrasonic methods, namely, sound velocity dispersion and ultrasonic absorption. Ultrasonic absorption was determined in the frequency range 0.5 … 13.0 MHz employing both acoustic streaming and pulse techniques. The velocity dispersion was studied by using an ultrasonic interferometer in the frequency range 0.5 … 5.0 MHz. The relaxation parameters, pertaining to the interconversion of the axial and equatorial isomers, evaluated from both the methods agree well with each other indicating the effectiveness of both the methods in understanding the relaxation behaviour of any liquid.

Zusammenfassung

Mittels zweier, voneinander unabhängiger Verfahren, nämlich der Schallgeschwindigkeitsdispersion und der Ultraschallabsorption, wurde das Ultraschall-Relaxationsverhalten von Chlorzyklohexan untersucht. Die Ultraschallabsorption wurde in einem Frequenzbereich von 0,5 … 13,0 MHz sowohl über die akustische Flüssigkeitsströmung als auch über Pulsverfahren bestimmt. Die Geschwindigkeitsdispersion wurde in einem Frequenzbereich von 0,5 … 5,0 MHz unter Verwendung eines Ultraschall-Interferometers ermittelt. Die Relaxationsparameter, die zur wechselweisen Umwandlung der axialen in äquatoriale Isomere gehören, stimmen nach beiden Verfahren gut überein. Es zeigt sich somit, daß beide Methoden wirksame Hilfsmittel zum Verständnis des Relaxationsverhaltens beliebiger Flüssigkeiten bilden.

Sommaire

On a étudié la relaxation dans le chlorocyclohexane au moyen de deux méthodes indépendantes : la dispersion de la vitesse du son et l'absorption ultrasonique. Cette dernière a été déterminée dans la bande de 0,5 à 13,0 MHz par la technique de l'écoulement induit acoustiquement et par la technique des impulsions. La dispersion des vitesses a été mesurée par interférométrie dans la bande de 0,5 à 5,0 MHz. Les paramètres de la relaxation, qui consiste dans l'interconversion des isomères axial et equatorial, concordent bien, ce qui prouve l'efficacité de chacune des deux méthodes pour l'étude de la relaxation dans les liquides.
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Document Type: Research Article

Publication date: November 1, 1979

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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