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Rate of shear of an ultrasonic oscillating rod viscosity probe

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journal contribution
posted on 06.10.2015 by Amir Rabani, Valerie Pinfield, Richard E. Challis
Ultrasonic oscillating rod probes have recently been used by researchers to measure viscosity and/or density in fluids. However, in order to use such probes to characterise the rheological properties of fluids, it is necessary to define the shear rate produced by the probe. This paper proposes an analytical solution to estimate the shear rate of ultrasonic oscillating rod viscosity probes and a method to measure their maximum operational shear rate. A relationship is developed which relates the torsional surface velocity of an oscillating cylindrical rigid body to the rate of shear in its vicinity. The surface displacement and torsional surface velocity of a torsional probe of length 1000 mm and diameter 1 mm were measured over the frequency range from 525 to 700 kHz using a laser interferometer and the maximum shear rate estimated. The reported work provides the basis for characterising shear rate for such probes, enabling their application for rheological investigations.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Ultrasonics

Volume

Accepted

Citation

RABANI, A., PINFIELD, V.J. and CHALLIS, R.E., 2016. Rate of shear of an ultrasonic oscillating rod viscosity probe. Ultrasonics, 6, pp.18-22

Publisher

© 2015 The Authors. Published by Elsevier B.V.

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Publication date

2016

Notes

This paper was published as Open Access by Elsevier and is licensed under a Creative Commons Attribution 4.0 License. For more information, see http://creativecommons.org/licenses/by/4.0/

ISSN

0041-624X

Language

en

Licence

Exports