Application of SH surface acoustic waves for measuring the viscosity of liquids in function of pressure and temperature |
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Authors: | Kiełczyński P Szalewski M Balcerzak A Rostocki A J Tefelski D B |
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Affiliation: | aSection of Acoustoelectronics, Institute of Fundamental Technological Research, Polish Academy of Sciences, ul. Pawińskiego 5B, 02-106 Warsaw, Poland;bFaculty of Physics, Warsaw University of Technology, ul. Koszykowa 75, 00-662 Warsaw, Poland |
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Abstract: | Viscosity measurements were carried out on triolein at pressures from atmospheric up to 650 MPa and in the temperature range from 10 °C to 40 °C using ultrasonic measuring setup. Bleustein–Gulyaev SH surface acoustic waves waveguides were used as viscosity sensors. Additionally, pressure changes occurring during phase transition have been measured over the same temperature range. Application of ultrasonic SH surface acoustic waves in the liquid viscosity measurements at high pressure has many advantages. It enables viscosity measurement during phase transitions and in the high-pressure range where the classical viscosity measurement methods cannot operate. Measurements of phase transition kinetics and viscosity of liquids at high pressures and various temperatures (isotherms) is a novelty. The knowledge of changes in viscosity in function of pressure and temperature can help to obtain a deeper insight into thermodynamic properties of liquids. |
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Keywords: | SH surface acoustic waves Viscosity High pressure Phase transitions |
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