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Temperature dependence of bulk viscosity in water using acoustic spectroscopy

Lookup NU author(s): Dr Nicholas Parker

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Abstract

Despite its fundamental role in the dynamics of compressible fluids, bulk viscosity has received little experimental attention and there remains a paucity of measured data. Acoustic spectroscopy provides a robust and accurate approach to measuring this parameter. Working from the Navier-Stokes model of a compressible fluid one can show that the bulk viscosity makes a significant and measurable contribution to the frequency-squared acoustic attenuation. Here we employ this methodology to determine the bulk viscosity of Millipore water over a temperature range of 7 to 50°C. The measured attenuation spectra are consistent with the theoretical predictions, while the bulk viscosity of water is found to be approximately three times larger than its shear counterpart, reinforcing its significance in acoustic propagation. Moreover, our results demonstrate that this technique can be readily and generally applied to fluids to accurately determine their temperature dependent bulk viscosities.


Publication metadata

Author(s): Parker NG; Holmes MJ; Povey MJW

Publication type: Article

Journal: Journal of Physics: Conference Series

Year: 2011

Volume: 269

Issue: 1

ISSN (print): 1742-6588

ISSN (electronic): 1742-6596

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/1742-6596/269/1/012011

DOI: 10.1088/1742-6596/269/1/012011


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