Journal of Pure and Applied Ultrasonics

V. K. Pundhir ¹

Affiliations
1 Sagar Institute of Research & Technology Excellence, Ayodhya Bypass Road, Bhopal-462041 (M.P.), IN

Abstract

Acoustical measurements in liquid metals have been primarily concerned with the direct measurement of ultrasonic velocity and attenuation in order to obtain information on their structures and thus contributing our knowledge of the liquid state. Ultrasonic attenuation measurement in particular provides means of distinguishing the non-atomic behavior or otherwise of simple liquid metals, which are notably different from the non-metallic liquids in that the major contribution to the attenuation is due to the thermal conductivity loss. A theoretical model has been developed on the lines of the two-state model applicable for associated liquids. This model renders satisfactory results for the excess ultrasonic attenuation in the liquid metals.

Keywords

Liquid Metals, Ultrasonic Attenuation, Ultrasonic Relaxation, Transport Properties.

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R. K. Shukla ¹, V. K. Pundhir ², V. S. Gangwar ¹, Kirti Srivastava ¹

Affiliations
1 Department of Chemistry, V.S.S.D. College, Kanpur-208002, IN
2 Department of Basic Sciences, S.I.R.T. Excellence, Bhopal-462041, IN

Abstract

Densities and speed of sound were measured for the binary liquid mixtures formed by formamide, N-methylacetamide, di-methylformamide and di-methylacetamide with acetonitrile at 293.15, 298.15, 303.15, 308.15 and 313.15 K and atmospheric pressure over the whole concentration range. Prigogine-Flory-Patterson model (PFP), Ramaswamy and Anbananthan (RS) model and model derived by Glinski, were utilized to predict the associational behavior of weakly interacting liquids. The measured properties were fitted to Redlich-Kister polynomial relation to estimate the binary coefficients and standard errors. An attempt has also been made to study the molecular interactions involved in the liquid mixture from observed data. Furthermore, McAllister multi body interaction model was also used to correlate the binary properties. These non-associated and associated models were compared and tested for different systems showing that the associated processes yield fair agreement between theory and experiment as compared to non-associated processes.

Keywords

Ultrasonic Velocity, Prigogine-Flory-Patterson, McAllister, Ramaswamy and Anbananthan, Isentropic Compressibility and Redlich-Kister.

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