Ultrasonic absorption and velocity measurements were made as a function of temperature for the binary mixtures of benzene-coconut oil and hexane-β, β′-dichloroethyl ether. Ultrasonic absorption at 5, 7, 10, 15, 21, and 25 MHz and above T_c is a analyzed by the dynamic scaling theory of Ferrell and Bhattacharjee (FB). The ultrasonic absorption of the two binary mixtures exhibit strong temperature and frequency dependence near T_c. Ultrasonic velocity behaves as a linearly decreasing function of temperature above the critical temperature satisfying linear relation. The observed of α_c/f² Vs. f^−1.06 yields a straight line as predicted by FB theory. Experimental values of α/α_c for the two binary critical mixtures are compared to the scaling function F(ω*).

Title

Acta Acustica united with Acustica, Volume 91, Number 4, July/August 2005 , pp. 716-722(7)

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Publisher Country

Palestine

Publication Type

Both (Printed and Online)

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Year

2005

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