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Article

Viscoelastic Particle Focusing and Separation in a Spiral Channel

1
Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA
2
Department of Chemical Engineering, University of Utah, Salt Lake City, UT 84112, USA
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Lanju Mei and Shizhi Qian
Micromachines 2022, 13(3), 361; https://doi.org/10.3390/mi13030361
Received: 1 February 2022 / Revised: 18 February 2022 / Accepted: 22 February 2022 / Published: 25 February 2022
(This article belongs to the Special Issue Non-Newtonian Microfluidics)
As one type of non-Newtonian fluid, viscoelastic fluids exhibit unique properties that contribute to particle lateral migration in confined microfluidic channels, leading to opportunities for particle manipulation and separation. In this paper, particle focusing in viscoelastic flow is studied in a wide range of polyethylene glycol (PEO) concentrations in aqueous solutions. Polystyrene beads with diameters from 3 to 20 μm are tested, and the variation of particle focusing position is explained by the coeffects of inertial flow, viscoelastic flow, and Dean flow. We showed that particle focusing position can be predicted by analyzing the force balance in the microchannel, and that particle separation resolution can be improved in viscoelastic flows. View Full-Text
Keywords: particle separation; viscoelastic flow; inertial focusing; spiral channel particle separation; viscoelastic flow; inertial focusing; spiral channel
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MDPI and ACS Style

Feng, H.; Jafek, A.R.; Wang, B.; Brady, H.; Magda, J.J.; Gale, B.K. Viscoelastic Particle Focusing and Separation in a Spiral Channel. Micromachines 2022, 13, 361. https://doi.org/10.3390/mi13030361

AMA Style

Feng H, Jafek AR, Wang B, Brady H, Magda JJ, Gale BK. Viscoelastic Particle Focusing and Separation in a Spiral Channel. Micromachines. 2022; 13(3):361. https://doi.org/10.3390/mi13030361

Chicago/Turabian Style

Feng, Haidong, Alexander R. Jafek, Bonan Wang, Hayden Brady, Jules J. Magda, and Bruce K. Gale. 2022. "Viscoelastic Particle Focusing and Separation in a Spiral Channel" Micromachines 13, no. 3: 361. https://doi.org/10.3390/mi13030361

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