论文标题
流动相交处的三维涡流诱导的反应热点
Three-dimensional Vortex-induced Reaction Hotspots at Flow Intersections
论文作者
论文摘要
我们显示了由三维（3D）涡流引起的反应热点的出现，并具有简单的$ a+b \ rightarrow c $反应。我们进行微流体实验，以可视化反应速率的空间图与化学发光反应，并通过直接数值模拟对结果进行盘问。在螺旋鞍型停滞点形成3D涡旋，而3D涡流流拓扑对于启动反应热点至关重要。对于粗壁通道，涡流对混合和反应的影响变得更加有效，并且我们的发现在通道尺寸和Damköhler数字的范围内有效。
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.
