Theoretical Analysis of the Intensity of Ultrasound Absorption in Aqueous Alcoholic Solutions
DOI:
https://doi.org/10.15407/ujpe64.9.820Keywords:
ultrasound absorption coefficient, ultrasound absorption maximum, aqueous alcoholic solutions, Lagrange–Rayleigh function, new phase nuclei, interaction with the acoustic fieldAbstract
Ultrasound absorption in aqueous alcoholic solutions has been studied in the vicinity of their singular points. The abnormal ultrasound absorption is assumed to occur due to the formation of unstable nuclei of a new phase. A model for the time evolution of those nuclei is proposed. The model makes it possible to explain the emergence of the resonance ultrasound absorption in the vicinity of the singular point of the 2-propanol solution. The dependences of the absorption intensity on the nucleus parameters, temperature, and ultrasound frequency are analyzed. A contribution of the ultrasound radiation from the nuclei to the effective shear viscosity of the solutions is estimated. The results of theoretical calculations are compared with available experimental data.
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