Volume 65, Number 2, January 2004
|Page(s)||221 - 227|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 January 2004|
Scaling frequency in the critical sound attenuation of binary liquids
Drittes Physikalisches Institut, Georg-August-Universität Bürgerstrasse 42-44, 37073 Göttingen, Germany
Accepted: 6 November 2003
For the ethanol-dodecane and methanol-cyclohexane mixtures of critical composition ultrasonic attenuation, shear viscosity, and dynamic light scattering data are evaluated to yield the scaled half-attenuation frequency of the Bhattacharjee-Ferrell dynamic scaling model as well as the Folk-Moser and the Onuki scaling functions. Within the limits of experimental error, the experimental half-attenuation frequency values for the former model () agree with the theoretical prediction. The values derived for the Folk-Moser and the Onuki scaling functions exhibit systematic deviations from the theoretical values and . The results show that, at least for systems without crossover to elementary chemical reactions, the frequency scale in the dynamic scaling model, which had been obtained by including a special hydrodynamic effect, is in accord with experimental evidence.
PACS: 68.35.Rh – Phase transitions and critical phenomena / 62.60.+v – Acoustical properties of liquids
© EDP Sciences, 2004
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