Experimental characterisation of a novel viscoelastic rectifier design

被引：19

作者：

Jensen, Kristian Ejlebjerg ^{[1
]}

Szabo, Peter ^{[2
]}

Okkels, Fridolin ^{[1
]}

Alves, M. A. ^{[3
]}

机构：

[1] Tech Univ Denmark, Dept Micro & Nanotechnol, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Dept Chem & Biochem Engn, DK-2800 Lyngby, Denmark

[3] Univ Porto, Dept Chem Engn, CEFT, Fac Engn, P-4200465 Oporto, Portugal

来源：

BIOMICROFLUIDICS | 2012年 / 6卷 / 04期

关键词：

bioMEMS; flow simulation; flow visualisation; measurement uncertainty; microfluidics; non-Newtonian flow; numerical analysis; rectifiers; streak photography; viscoelasticity; MICROFLUIDIC RECTIFIERS; FLUID-FLOW;

D O I：

10.1063/1.4769781

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A planar microfluidic system with contractions and obstacles is characterized in terms of anisotropic flow resistance due to viscoelastic effects. The working mechanism is illustrated using streak photography, while the diodicity performance is quantified by pressure drop measurements. The point of maximum performance is found to occur at relatively low elasticity levels, with diodicity around 3.5. Based on a previously published numerical work [Ejlebjerg , Appl. Phys. Lett. 100, 234102 (2012)], 2D simulations of the FENE-CR differential constitutive model are also presented, but limited reproducibility and uncertainties of the experimental data prevent a direct comparison at low elasticity, where the flow is essentially two-dimensional. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769781]

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