New ultrasonic Bleustein-Gulyaev wave method for measuring the viscosity of liquids at high pressure.

In this paper, a new method for measuring the viscosity of liquids at high pressure is presented. To this end the authors have applied an ultrasonic method using the Bleustein-Gulyaev (BG) surface acoustic wave. By applying the perturbation method, we can prove that the change in the complex propagation constant of the BG wave produced by the layer of liquid loading the waveguide surface is proportional to the shear mechanical impedance of the liquid. In the article, a measuring setup employing the BG wave for the purpose of measuring the viscosity of liquids at high pressure (up to 1 GPa) is presented. The results of high-pressure viscosity measurements of triolein and castor oil are also presented. In this paper the model of a Newtonian liquid was applied. Using this new method it is also possible to measure the viscosity of liquids during the phase transition and during the decompression process (hysteresis of the dependence of viscosity on pressure).

[1]  御子柴宣夫.  B. A. Auld : Acoustic Fields and Waves in Solids, Vol. 1 and 2, John Wiley, New York and London, 1973, 2 vols., 23.5×16cm. , 1974 .

[2]  R. Wisniewski,et al.  High pressure phase transition in rape-seed oil , 2007 .

[3]  E. Herbolzheimer,et al.  The diamond‐anvil cell as a high‐pressure viscometer , 1992 .

[4]  Y. Kurosaki,et al.  Micro-rheometry of pressurized lubricants and micro-nanorheology , 2005 .

[5]  S. Sugasawa.  Time Difference Measurement of Ultrasonic Pulses Using Cross-Correlation Function between Analytic Signals , 2002 .

[6]  D. Ripple.  A compact, high-pressure capillary viscometer , 1992 .

[7]  Jay W. Grate,et al.  Acoustic Wave Sensors , 1996 .

[8]  P. Kiełczyński,et al.  Measurement of the shear storage modulus and viscosity of liquids using the Bleustein–Gulyaev wave , 2004 .

[9]  P. Kiel,et al.  Determination of the shear impedance of viscoelastic liquids using Love and Bleustein–Gulyaev surface waves , 1989 .

[10]  B. Auld,et al.  Acoustic fields and waves in solids , 1973 .

[11]  B. A. Auld,et al.  Acoustic Fields and Waves in Solids: Two Volumes , 1974 .

[12]  Yingzhao Hou,et al.  Instrument techniques for rheometry , 2005 .

[13]  W. Philippoff.  Viscoelasticity of Polymer Solutions at High Pressures and Ultrasonic Frequencies , 1963 .

[14]  P. Vergne.  New high-pressure viscosity measurements on di(2-ethylhexyl) sebacate and comparisons with previous data , 1990 .

[15]  A. Collings,et al.  Torsional crystal technique for the measurement of viscosities of liquids at high pressure , 1971 .

[16]  Edward T. Zellers,et al.  Chapter 3 – Acoustic Wave Sensors and Responses , 1997 .