Ultrasonic study on organic liquid and binary organic liquid mixtures by using Schaaffs' collision factor theory
Lu Yi-Gang(卢义刚)a)† and Dong Yan-Wu(董彦武)b)
a School of Physics, South China University of Technology, Guangzhou 510640, China; b Applied Acoustics Institute, Shaanxi Normal University, Xi'an 710062, China
Abstract Based on Schaaff's collision factor theory (CFT) in liquids, the equations for nonlinear ultrasonic parameters in both organic liquid and binary organic liquid mixtures are deduced. The nonlinear ultrasonic parameters, including pressure coefficient, temperature coefficients of ultrasonic velocity, and nonlinear acoustic parameter B/A in both organic liquid and binary organic liquid mixtures, are evaluated for comparison with the measured results and data from other sources. The equations show that the coefficient of ultrasonic velocity and nonlinear acoustic parameter B/A are closely related to molecular interactions. These nonlinear ultrasonic parameters reflect some information of internal structure and outside status of the medium or mixtures. From the exponent of repulsive forces of the molecules, several thermodynamic parameters, pressure and temperature of the medium, the nonlinear ultrasonic parameters and ultrasonic nature of the medium can be evaluated. When evaluating and studying nonlinear acoustic parameter B/A of binary organic liquid mixtures, there is no need to know the nonlinear acoustic parameter B/A of the components. Obviously, the equation reveals the connection between the nonlinear ultrasonic nature and internal structure and outside status of the mixtures more directly and distinctly than traditional mixture law for B/A, e.g. Apfel's and Sehgal's laws for liquid binary mixtures.
Received: 10 August 2005
Revised: 15 May 2006
Accepted manuscript online:
PACS:
42.55.Rz
(Doped-insulator lasers and other solid state lasers)
Lu Yi-Gang(卢义刚) and Dong Yan-Wu(董彦武) Ultrasonic study on organic liquid and binary organic liquid mixtures by using Schaaffs' collision factor theory 2006 Chinese Physics 15 2030
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