NDLI: Does the Viscosity Exponent Derive from Ultrasonic Attenuation Spectra?

Content Provider	Springer Nature Link
Author	Bhattacharjee, J. K. Mirzaev, S. Z. Kaatze, U.
Copyright Year	2012
Abstract	Based on a representation of the sound velocity of critical liquids in terms of a frequency-dependent complex specific heat at constant pressure, a simple relation between the low-frequency normalized sonic attenuation coefficient and the correlation length of fluctuations is derived. This relation provides a promising alternative for the determination of the dynamics exponent and thus the critical exponent of the shear viscosity. Sonic attenuation data from the literature, measured at frequencies down to 50 kHz, are re-evaluated with a view of the viscosity exponent determination. It is found that only in a small temperature range, the major requirement of the approach is fulfilled with the available data. Close to the critical temperature, the frequencies of measurement are still insufficiently small as compared to the inverse relaxation time of order parameter fluctuations. Criteria for future experiments are discussed briefly.
Starting Page	469
Ending Page	483
Page Count	15
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	33
Issue Number	3
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2012-02-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Binary mixtures Critical shear viscosity Scaling Ultrasonic attenuation Viscosity exponent Physical Chemistry Industrial Chemistry/Chemical Engineering Condensed Matter Physics Mechanics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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