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Suppression of the Segré–Silberberg effect by polymer additives

Published online by Cambridge University Press:  28 January 2025

Daekwon Jin ,
Jee In Park ,
Jae Bem You Open the ORCID record for Jae Bem You [Opens in a new window] ,
Younghun Kim ,
Hyomin Lee  and
Ju Min Kim Open the ORCID record for Ju Min Kim [Opens in a new window]
Daekwon Jin
Affiliation:
Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
Jee In Park
Affiliation:
Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
Jae Bem You
Affiliation:
Department of Chemical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
Younghun Kim
Affiliation:
Department of Chemical Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
Hyomin Lee
Affiliation:
Department of Chemical & Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
Ju Min Kim*
Affiliation:
Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea Department of Chemical Engineering, Ajou University, Suwon 16499, Republic of Korea
*
†Email address for correspondence: jumin@ajou.ac.kr
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Abstract

Particle-laden flow through conduits is ubiquitous in both natural and industrial systems. In such flows, particles often migrate across the main fluid stream, resulting in non-uniform spatial distribution owing to particle–fluid and particle–particle interactions. The most relevant lateral particle migration mechanism by particle–fluid interaction is the Segré–Silberberg effect, which is induced by the inertial forces exerted on a particle, as the flow rate increases. However, methods to suppress it have not been suggested yet. Here, we demonstrate that adding a small amount of polymer to the particle-suspending solvent effectively suppresses the Segré–Silberberg effect in a square channel. To accurately determine the position of the particles within the channel cross-sections, we devised a dual-view imaging system applicable to microfluidic systems. Our analyses show that the Segré–Silberberg effect is effectively suppressed in a square microchannel due to the balance between the inertial and elastic forces at an optimal polymer concentration while maintaining nearly constant shear viscosity.

JFM classification

Non-Newtonian Flows: Viscoelasticity Multiphase and Particle-laden Flows: Particle/fluid flow Micro-/Nano-fluid dynamics: Microfluidics
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 1004 , 10 February 2025 , A5
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Copyright
© The Author(s), 2025. Published by Cambridge University Press

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