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- W4385059472 abstract "The key to speeding up analysis in microfluidic applications is to improve species mixing. Diffusion often predominates during electroosmotic flow mixing. Recent computational simulations have shown that the addition of heterogenous charged surface may increase mixing efficiency by generating focused flow circulation areas. This study focuses on enhancing the effectiveness of mixing diluted species with the aid of electro-osmotic driven flow, where heterogeneous surface charges are induced on the walls of the microchannel. Different surface patterns were examined to assess their impacts on mixing by varying the magnitudes and polarities of the applied zeta potentials. Additionally, the impact of altering the aspect ratio of the microchannel on the overall mixing efficiency was investigated. COMSOL Multiphysics (version 5.4) software was utilized to model the proposed micro-mixer and analyze its performance. Results have demonstrated that, opposing surface charges result in the most effective mixing due to their opposition of flow motion, which generates enhanced vortices that contribute to effective mixing. The most effective mixing was achieved by serpentine designs (98.5%), whereas diagonal surface patterns had the least effective mixing (70.8%). Results also showed that mixing was more efficient at 100 mV zeta potentials when compared to 25 and 50 mV. High aspect ratios have also been proven to increase the micro-mixer's effectiveness, where a 3:1 (Height: Width) aspect ratio has resulted in a 12.2% enhancement compared to a 1:3 aspect ratio." @default.
- W4385059472 created "2023-07-23" @default.
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- W4385059472 date "2023-02-20" @default.
- W4385059472 modified "2023-10-18" @default.
- W4385059472 title "Modeling of Electro-Osmotic Mixing With Heterogeneous Surface Charges" @default.
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- W4385059472 doi "https://doi.org/10.1109/aset56582.2023.10180733" @default.
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