Effective viscosity in a wave propagation model for ultrasonic particle sizing in non-dilute suspensions

Estimates of particle size distributions (PSDs) in solid-in-liquid suspensions can be obtained from measurements of ultrasonic wave attenuation. The technique is based on adaptively fitting theoretical wave propagation models to the measured data across a frequency range. These models break down at...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2014-10, Vol.136 (4), p.1583-1590
Main Authors: Al-Lashi, Raied S, Challis, Richard E
Format: Article
Language:English
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Summary:Estimates of particle size distributions (PSDs) in solid-in-liquid suspensions can be obtained from measurements of ultrasonic wave attenuation. The technique is based on adaptively fitting theoretical wave propagation models to the measured data across a frequency range. These models break down at high solid concentrations and it is believed that this failure is due to the effective viscosity of the mixture in the vicinity of the particles being different from that of the continuous phase. This paper discusses PSD estimation when a number of different viscosity formulations are incorporated into the wave propagation model. The viscosity model due to Happel provides the best estimate of PSD in suspensions of medium concentration.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4894689