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Updated: Jul 6, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
Published on: June 12, 2015
Bridging kinematics and concentration content in a chaotic micromixer
E Villermaux1, A D Stroock, H A Stone
1Aix-Marseille Université, IRPHE, 13384 Marseille Cedex 13, France. villermaux@irphe.univ-mrs.fr
Abstract:
We analyze the mixing properties of the microfluidic herringbone configuration introduced to mix scalar substances in a narrow channel at low Reynolds but large Péclet numbers. Because of the grooves sculpted on the channel floor, substantial transverse motions are superimposed onto the usual longitudinal Poiseuille dispersion along the channel, whose impact on both the mixing rate and mixture content is quantified. We demonstrate the direct link between the flow kinematics and the deformation rate of the mixture's concentration distribution, whose overall shape is also determined.
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