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Experimental verification of nanofluid shear-wave reconversion in ultrasonic fields

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posted on 15.01.2016 by Derek Michael Forrester, Jinrui Huang, Valerie Pinfield, Francine Luppe
Here we present the verification of shear-mediated contributions to multiple scattering of ultrasound in suspensions. Acoustic spectroscopy was carried out with suspensions of silica of differing particle sizes and concentrations in water to find the attenuation at a broad range of frequencies. As the particle sizes approach the nanoscale, commonly used multiple scattering models fail to match experimental results. We develop a new model, taking into account shear mediated contributions, and find excellent agreement with the attenuation spectra obtained using two types of spectrometer. The results determine that shear-wave phenomena must be considered in ultrasound characterisation of nanofluids at even relatively low concentrations of scatterers that are smaller than one micrometre in diameter.

Funding

The authors acknowledge funding from the EPSRC, grant number EP/L018780/1

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Nanoscale

Citation

FORRESTER, D.M. ...et al., 2015. Experimental verification of nanofluid shear-wave reconversion in ultrasonic fields. Nanoscale, 8 (10), pp. 5497-5506.

Publisher

© Royal Society of Chemistry

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

Publication date

2015

Notes

This is an Open Access Article. It is published by Royal Society of Chemistry under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/. The dataset which supports this article can be found at http://dx.doi.org/10.17028/rd.lboro.2056149

ISSN

2040-3364

eISSN

2040-3372

Language

en

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