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Fully developed and transient concentration profiles of particulate suspensions sheared in a cylindrical Couette cell

Published online by Cambridge University Press:  15 January 2019

Mohammad Sarabian ,
Mohammadhossein Firouznia Open the ORCID record for Mohammadhossein Firouznia [Opens in a new window] ,
Bloen Metzger Open the ORCID record for Bloen Metzger [Opens in a new window]  and
Sarah Hormozi Open the ORCID record for Sarah Hormozi [Opens in a new window]
Mohammad Sarabian
Affiliation:
Department of Mechanical Engineering, Ohio University, 251 Stocker Center, Athens, OH 45701, USA
Mohammadhossein Firouznia
Affiliation:
Department of Mechanical Engineering, Ohio University, 251 Stocker Center, Athens, OH 45701, USA
Bloen Metzger
Affiliation:
Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13453 Marseille, France
Sarah Hormozi*
Affiliation:
Department of Mechanical Engineering, Ohio University, 251 Stocker Center, Athens, OH 45701, USA
*
†Email address for correspondence: [email protected]
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Abstract

We experimentally investigate particle migration in a non-Brownian suspension sheared in a Taylor–Couette configuration and in the limit of vanishing Reynolds number. Highly resolved index-matching techniques are used to measure the local particulate volume fraction. In this wide-gap Taylor–Couette configuration, we find that for a large range of bulk volume fraction, $\unicode[STIX]{x1D719}_{b}\in [20\,\%{-}50\,\%]$, the fully developed concentration profiles are well predicted by the suspension balance model of Nott & Brady (J. Fluid Mech., vol. 275, 1994, pp. 157–199). Moreover, we provide systematic measurements of the migration strain scale and of the migration amplitude which highlight the limits of the suspension balance model predictions.

JFM classification

Complex Fluids: Suspensions
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 862 , 10 March 2019 , pp. 659 - 671
Copyright
© 2019 Cambridge University Press 

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