Viscoelastic Particle Focusing and Separation in a Spiral Channel.

Viscoelastic Particle Focusing and Separation in a Spiral Channel.
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DOI:
10.3390/mi13030361
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发表时间:
2022-02-25
期刊:
影响因子:
3.4
通讯作者:
Gale BK
Gale BK
中科院分区:
工程技术3区
文献类型:
--
作者:
Feng H;Jafek AR;Wang B;Brady H;Magda JJ;Gale BK

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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.
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