Universal Plot of the Ratio of Sound Dispersion to Attenuation for Critical Fluids

Abstract

The experimental ratio Δ(ω^*) of critical sound dispersion to attenuation has compared with the mode coupling theory using available data on four different critical fluid systems; n-heptane-nitrobenzene, triethylamine-water, Xenon and Helium three. It was demonstrated that the universal plot for the experimental Δ(ω^*) could fairly be described by the mode coupling theory assuming the empirical form for correlation function obtained by Tartaglia and Thoen on the basis of Fisher-Langer theory.