Abstract An empirical analysis is conducted to evaluate the effect of the geometric parameters of microchannel on the mixing performance at high flow rates. The mixing performance is assessed using I−/IO3−parallel competition reaction covering the whole flow regime, and measured using segregation index (Xs) covering different lengths of outlet tube (Lout), volume of mixing chamber (Vmc) covering a wide range of Reynolds number. Results show that the channel geometric parameters have significant influence on the mixing process. The segregation index is found to increase with increase in H+concentration and volumetric flow ratio (R), while decrease with increase in the outlet (dout) and inlet tube diameter (din). The highest mixing efficiency corresponds to highest Reynolds number, c(H+) = 0.05 mol/L, R = 1, din = dout = 5 mm, Lout = 20 cm and Vmc = 0.9 cm3. Regression analysis is performed to relate the micromixing time with the influencing parameters. An optimal mixing time of 0.5 ms can be achieved in a T-shape microchannel. As compared to other forms of reactors, the optimized T-shape microchannel is identified to possess excellent mixing characteristics, which could find promising applications for high flux reaction process.

中文翻译：

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Villermaux-Dushman 反应在高流速下在 T 形微通道中的混合性能

摘要 对微通道几何参数对高流速混合性能的影响进行了实证分析。混合性能使用覆盖整个流态的 I-/IO3-平行竞争反应进行评估，并使用覆盖不同出口管长度 (Lout)、混合室体积 (Vmc) 的分离指数 (Xs) 测量，覆盖范围广泛雷诺数。结果表明，通道几何参数对混合过程有显着影响。发现分离指数随着 H+ 浓度和体积流量比 (R) 的增加而增加，而随着出口 (dout) 和入口管直径 (din) 的增加而减少。最高混合效率对应最高雷诺数，c(H+) = 0.05 mol/L，R = 1，din = dout = 5 mm，Lout = 20 cm，Vmc = 0.9 cm3。进行回归分析以将微混合时间与影响参数相关联。在 T 形微通道中可以实现 0.5 ms 的最佳混合时间。与其他形式的反应器相比，优化的 T 形微通道被认为具有优异的混合特性，可以在高通量反应过程中找到有前景的应用。