Dynamic sound scattering investigation of the dynamics of sheared particulate suspensions

Anatoliy Strybulevych, Tomohisa Norisuye, Matthew Hasselfield, J. H. Page

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

We show how Dynamic Sound Scattering (the acoustical analog of Dynamic Light Scattering) can be used to measure the average velocity profile and the particle velocity variance of neutrally buoyant suspensions in the Couette geometry. The motion of the particles was determined from the temporal autocorrelation function of the scattered field fluctuations in a single speckle spot. In contrast to theories that assume isotropic particle velocity fluctuations, it is shown that "suspension temperature" (defined as the average kinetic energy contained in the particle velocity fluctuations) is a tensor, whose components have different magnitudes. For particle volume fractions up to 0.4, components of the fluctuations parallel to the flow and in the vertical direction are much larger than in the radial direction. For higher concentrations the fluctuation anisotropy decreases.

Original languageEnglish (US)
Title of host publicationComplex Systems - 5th International Workshop on Complex Systems
Pages354-358
Number of pages5
DOIs
Publication statusPublished - Mar 13 2008
Event5th International Workshop on Complex Systems - Sendai, Japan
Duration: Sep 25 2007Sep 28 2007

Publication series

NameAIP Conference Proceedings
Volume982
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other5th International Workshop on Complex Systems
CountryJapan
CitySendai
Period9/25/079/28/07

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Strybulevych, A., Norisuye, T., Hasselfield, M., & Page, J. H. (2008). Dynamic sound scattering investigation of the dynamics of sheared particulate suspensions. In Complex Systems - 5th International Workshop on Complex Systems (pp. 354-358). (AIP Conference Proceedings; Vol. 982). https://doi.org/10.1063/1.2897814