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Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow
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10.1063/1.3279790
/content/aip/journal/bmf/4/1/10.1063/1.3279790
http://aip.metastore.ingenta.com/content/aip/journal/bmf/4/1/10.1063/1.3279790

Figures

Image of FIG. 1.
FIG. 1.

Dimensions of micromixer: (a) design A, (b) design B, (c) design C, and (d) design D.

Image of FIG. 2.
FIG. 2.

Sinusoidal electric field with amplitude and frequency , and dc bias are applied at two inlet reservoirs of microchannel (not drawn to scale). Two waveforms are out of phase by 180°.

Image of FIG. 3.
FIG. 3.

Mixing condition at different ac amplitudes and frequencies for micromixer design A (dc electric field, ).

Image of FIG. 4.
FIG. 4.

Mixing efficiency for micromixer design A (at 1.2 mm downstream from T-junction) under various applied ac amplitudes, , and frequencies.

Image of FIG. 5.
FIG. 5.

Mixing condition at different ac amplitudes and frequencies for micromixer design B (dc electric field, ).

Image of FIG. 6.
FIG. 6.

Mixing efficiency for micromixer design B (at 1.2.mm downstream from T-junction) under various applied ac amplitudes, , and frequencies.

Image of FIG. 7.
FIG. 7.

Mixing condition at different ac amplitudes and frequencies for micromixer design C (dc electric field, ).

Image of FIG. 8.
FIG. 8.

Mixing efficiency for micromixer design C (at 1.2 mm downstream from T-junction) under various applied ac amplitudes, , and frequencies.

Image of FIG. 9.
FIG. 9.

Sequence of images at constriction for micromixer design C for and captured at 0.2 s intervals.

Image of FIG. 10.
FIG. 10.

Mixing condition at different ac amplitudes and frequencies for micromixer design C (dc electric field, ).

Image of FIG. 11.
FIG. 11.

Mixing efficiency for micromixer design D (at 1.2 mm downstream from T-junction) under various applied ac amplitudes, , and frequencies.

Image of FIG. 12.
FIG. 12.

Sequence for formation of trapezoidal fluid plugs in constriction. White arrows show fluid flow direction.

Image of FIG. 13.
FIG. 13.

Sequence for spreading of fluid plugs at exit of constriction.

Image of FIG. 14.
FIG. 14.

Length of contact for normal diffusive mixing process.

Image of FIG. 15.
FIG. 15.

Sequence for unsymmetrical spreading of trapezoidal plug at exit of constriction.

Image of FIG. 16.
FIG. 16.

Normalized concentration distribution across width of micromixer design C (at 1.2 mm after T-junction) with applied ac amplitude . Cross stream distance is normalized with width of channel .

Image of FIG. 17.
FIG. 17.

Normalized concentration distribution across width of micromixer design D (at 1.2 mm after T-junction) with applied ac amplitude . Cross stream distance is normalized with width of channel .

Image of FIG. 18.
FIG. 18.

Normalized concentration distribution across width of micromixer design D (at 1.2 mm after T-junction) with applied ac frequency 6.1 Hz. Cross stream distance is normalized with width of channel .

Tables

Generic image for table
Table I.

Electrical potential and electric field applied at inlets.

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/content/aip/journal/bmf/4/1/10.1063/1.3279790
2010-01-07
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow
http://aip.metastore.ingenta.com/content/aip/journal/bmf/4/1/10.1063/1.3279790
10.1063/1.3279790
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