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Effect of laminar velocity profile variation on mixing in microfluidic devices: The sigma micromixer
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10.1063/1.2996564
/content/aip/journal/apl/93/14/10.1063/1.2996564
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/14/10.1063/1.2996564
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Species A diffuses into liquid film B flowing with a given velocity profile. The interface concentration limit is (Ref. 5).

Image of FIG. 2.
FIG. 2.

Velocity profile varies throughout the channel periodically due to the sidewalls. The maximum of the profile shifts from the center and periodically sweeps the transverse direction, overlapping the progressing diffusion fronts which results in the enhancement of diffusion.

Image of FIG. 3.
FIG. 3.

Evaluation of mixing performance using color changes as a result of mixing of a indicator (phenolphthalein) and a basic solution (sodium hydroxide, ).

Image of FIG. 4.
FIG. 4.

(a) Mixing performance at a given mixing length as a function of flow Reynolds number, (b) Mixing performance at a given flow rate (, ) as a function of mixing length.

Image of FIG. 5.
FIG. 5.

Microparticle image velocimetry measurement of the laminar flow. Bottom layers move faster than the top layers at section A, whereas in section B the situation is reversed confirming passive variation of the velocity profile.

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/content/aip/journal/apl/93/14/10.1063/1.2996564
2008-10-10
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of laminar velocity profile variation on mixing in microfluidic devices: The sigma micromixer
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/14/10.1063/1.2996564
10.1063/1.2996564
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