We present a 3D metal printing showerhead mixer to blend effectively two reagent streams into a confined mixing volume. Each stream is predistributed to multiple channels to increase the contact area in the mixing zone, which enables high mixing performance with smaller pressure drop. The showerhead mixer shows excellent mixing performance owing to its ability to intersperse rapidly the two streams as characterized by the diazo coupling reactions and computational fluid dynamics (CFD) simulations. Experimental results demonstrate superior performance of the showerhead mixer compared to two common commercial micro T‐mixers, especially in low Reynolds number regime. CFD results are employed to (a) help understand the mixing mechanism, (b) reproduce the experimental observations, and (c) inform the design specifications for optimal performance. Good agreement between experiments and simulations is achieved. The final design includes multiple side‐fed inlets for improved mixing performance of the showerhead mixer, as suggested by the validated CFD models.

中文翻译：

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通过3D打印和喷头微混合器设计访问多维混合

我们提出了一种3D金属打印喷头混合器，可将两种试剂流有效地混合到一个有限的混合体积中。每个料流都预先分配到多个通道，以增加混合区域中的接触面积，从而实现较高的混合性能和较小的压降。由于重氮偶合反应和计算流体动力学（CFD）模拟的特征，喷淋头混合器由于能够快速散布两种流而具有出色的混合性能。实验结果表明，与两种常见的商用微型T型混合器相比，莲蓬头混合器具有更高的性能，尤其是在低雷诺数条件下。CFD结果用于（a）帮助理解混合机理，（b）重现实验观察结果，以及（c）告知设计规格以获得最佳性能。实验与模拟之间达成了良好的一致性。最终设计包括多个侧喂入口，以提高喷头混合器的混合性能，这是经过验证的CFD模型所建议的。