2007
DOI: 10.1143/jjap.46.1608
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Analysis of Electrokinetic Mixing Using AC Electric Field and Patchwise Surface Heterogeneities

Abstract: In this paper, the authors investigate the use of an applied AC electric field and microchannel surface heterogeneities to carry out the microfluidic mixing of two-dimensional, time-dependent electroosmotic flows. The time-dependent flow fields within the microchannel are simulated using the backwards-Euler time-stepping numerical method. The mixing efficiencies obtained in microchannels with two different patchwise surface heterogeneity patterns are investigated. In general, the results show that the applicat… Show more

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Cited by 11 publications
(5 citation statements)
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References 23 publications
(28 reference statements)
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“…This standard problem is then solved by a restarted, iterative Arnoldi method, which is essentially a sophisticated extension of the power iteration method, and which allows a number of eigenvalues,  , of largest magnitude to be calculated via ARPACK (Saad [19]). For the detailed algorithm of the linear stability analysis, one can refer to the studies of Yang and Luo [20], Luo et al [21] and Chen et al [13].…”
Section: Methodsmentioning
confidence: 99%
“…This standard problem is then solved by a restarted, iterative Arnoldi method, which is essentially a sophisticated extension of the power iteration method, and which allows a number of eigenvalues,  , of largest magnitude to be calculated via ARPACK (Saad [19]). For the detailed algorithm of the linear stability analysis, one can refer to the studies of Yang and Luo [20], Luo et al [21] and Chen et al [13].…”
Section: Methodsmentioning
confidence: 99%
“…Temporal profiles of the switching process were obtained using a detection system similar to that presented by Alarie et al [4]. The details of the measurement principle are presented in the literature [5], and hence the operating process is described only briefly in the following: (1) the sample was introduced into the inlet channel via the application of an electrical potential to the sample inlet channel, [6][7] (2) the same electrical potential was applied to each of the focusing channels in order to generate sheath flows to focus the sample into a narrow stream, and (3) the outlet channels were electrically isolated or grounded, as appropriate, in order to drive the focused sample flow electrokinetically to the required outlet port. The present microfluidic chip was fabricated on glass substrates using standard photolithography and wet chemical etching techniques.…”
Section: Methodsmentioning
confidence: 99%
“…Fluid mixing schemes can be divided into either "active", where external forces drive fluid movement, like electric field perturbations [1,2] and mechanical agitation [3], or "passive", where the contact area and contact time of the species samples are increased through specially designed inserts, like a static mixer [4] and modified wall [5,6]. A static mixer is an efficient mixing device that incorporates continuously repeating elements in the pipeline and influences the fluid flow during the process, intensifying the mass and heat transfer [7].…”
Section: Introductionmentioning
confidence: 99%