Three-Dimensional Vortex-Induced Reaction Hot Spots at Flow Intersections
Three-Dimensional Vortex-Induced Reaction Hot Spots at Flow Intersections
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DOI：
10.1103/physrevlett.124.144501
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发表时间：
2020-04-06
影响因子：
8.6
通讯作者：
Kang, Peter K.
中科院分区：
文献类型：
--
作者：
Lee, Sang H.;Kang, Peter K.
我们显示了一个简单的A + B -> 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，以可视化的空间地图的反应速率与化学发光反应和交叉验证的结果与直接的数值模拟。三维涡流在螺旋鞍型驻点处形成，并且三维涡流拓扑对于引发反应热点是必不可少的。涡流的混合和反应的效果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达姆科勒数。
We show the emergence of reaction hot spots induced by three-dimensional (3D) vortices with a simple A + B -> C reaction. We conduct microfluidics experiments to visualize the spatial map of the reaction rate with a 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 hot spots. 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 Damkohler numbers.