流动交叉口处的三维涡激反应热点
Three-dimensional Vortex-induced Reaction Hotspots at Flow Intersections
摘要：
我们显示了一个简单的$A+B \rightarrow C$反应的三维（3D）涡流引起的反应热点的出现。我们进行微流体实验，以可视化的反应速率与化学发光反应的空间图和交叉验证的结果与直接的数值模拟。在螺旋鞍型驻点处形成3D涡流，并且3D涡流拓扑结构对于引发反应热点是必不可少的。涡流对混合和反应的影响变得更加激烈的粗糙壁通道，我们的研究结果是有效的，在宽范围的通道尺寸和Damköhler数。
英文摘要：
We show the emergence of reaction hotspots induced by three-dimensional (3D) vortices with a simple $A+B \rightarrow C$ reaction. We conduct microfluidics experiments to visualize the spatial map of the reaction rate with the chemiluminescence reaction and cross-validate the results with direct numerical simulations. 3D vortices form at spiral saddle type stagnation points, and the 3D vortex flow topology is essential for initiating reaction hotspots. The effect of vortices on mixing and reaction becomes more vigorous for rough-walled channels, and our findings are valid over wide ranges of channel dimensions and Damköhler numbers.
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