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Optimization of an electrokinetic mixer for microfluidic applications
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10.1063/1.4722000
/content/aip/journal/bmf/6/2/10.1063/1.4722000
http://aip.metastore.ingenta.com/content/aip/journal/bmf/6/2/10.1063/1.4722000

Figures

Image of FIG. 1.
FIG. 1.

Sketch of the electrokinetic micromixer principle.

Image of FIG. 2.
FIG. 2.

Sketch of the computational domain.

Image of FIG. 3.
FIG. 3.

Measured (upper row) and simulated (lower row) path lines in the flow at constant height levels (a) Z = −0.43, (b)Z = −0.32, and (c) Z = 0.00. The flow consists of a pressure-driven base flow with Re = 0.1 and a counter-directed electrokinetic flow.

Image of FIG. 4.
FIG. 4.

3D simulations of the concentration field within the midplane of the micromixer at T = 30 for different modes of electrical excitations: (a) pure pressure-driven flow; (b) pressure-driven flow with a steady counter-directed electrokinetic flow; and (c) pressure-driven flow and an alternating electrokinetic flow ( and ). The Reynolds and Schmidt numbers are Re = 1 and Sc = 2340, respectively.

Image of FIG. 5.
FIG. 5.

Evolution of the cost functional, scaled with the (initial) value at T = 0, vs. the dimensionless simulation time T for different modes of electrical excitation.

Image of FIG. 6.
FIG. 6.

Concentration fields in the midplane of the micromixer at (a) T = 10, (b) T = 20, and (c) T = 30. The flow consists of a pressure-driven base flow with Re = 1 and an optimized electrokinetic flow induced by the optimized sine wave potential .

Image of FIG. 7.
FIG. 7.

Concentration fields in the midplane of the micromixer at (a) T = 10, (b) T = 20, and (c) T = 30. The flow consists of a pressure-driven base flow with Re = 1 and an optimized electrokinetic flow induced by the optimized square wave potential .

Tables

Generic image for table
Table I.

Optimized control parameters for two different electrical excitations.

Generic image for table
Table II.

Mixer efficiency and comparative mixer index at simulation time T=30.

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/content/aip/journal/bmf/6/2/10.1063/1.4722000
2012-05-24
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optimization of an electrokinetic mixer for microfluidic applications
http://aip.metastore.ingenta.com/content/aip/journal/bmf/6/2/10.1063/1.4722000
10.1063/1.4722000
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