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Sound attenuation, shear viscosity, and mutual diffusivity behavior in the nitroethane-cyclohexane critical mixture.
Autorzy
Rok wydania
2004
Czasopismo
Numer woluminu
121
Strony
5929-5934
DOI
10.1063/1.1781614
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The shear viscosityhs, mutual diffusion coefficientD, and ultrasonic attenuation spectra of thenitroethane-cyclohexane mixture of critical composition have been measured at varioustemperatures near the critical temperatureTc. The relaxation rate of order parameter fluctuationsresulting from a combined evaluation of thehsandDdata follows power law behavior with thetheoretical exponent and with the large amplitudeGo5( 15662)3109s21. The ultrasonic spectrahave been evaluated in terms of a critical contribution and a noncritical background contribution.The amplitude of the former exhibits a temperature dependence, in conformity with a temperaturedependence in the adiabatic coupling constant (ugu50.064 nearTcand 0.1 atT2Tc53 K) . If thevariation of the critical amplitude withTis taken into account the experimental attenuationcoefficient data display a scaling function which nicely fits to the theoretical prediction from theBhattacharjee–Ferrell dynamic scaling model@R. A. Ferrell and J. K. Bhattacharjee,
Adres publiczny
https://doi.org/10.1063/1.1781614