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Title: Rate of shear of an ultrasonic oscillating rod viscosity probe
Authors: Rabani, Amir
Pinfield, Valerie J.
Challis, Richard E.
Keywords: Ultrasonic oscillating rod
Shear rate
Torsional viscometer
Laser interferometer
Issue Date: 2016
Publisher: © 2015 The Authors. Published by Elsevier B.V.
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
Abstract: 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.
Description: 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/
Version: Published
DOI: 10.1016/j.ultras.2015.08.013
URI: https://dspace.lboro.ac.uk/2134/18952
Publisher Link: http://dx.doi.org/10.1016/j.ultras.2015.08.013
ISSN: 0041-624X
Appears in Collections:Published Articles (Chemical Engineering)

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