Three-Dimensional Vortex-Induced Reaction Hot Spots at Flow Intersections.

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 Damköhler numbers.

• Publication year

  2020

• Venue

  Physical Review Letters

• Publication date

  2020-02-08

• Fields of study

  Medicine, Physics, Chemistry, Engineering

• Identifiers
  DOI 10.1103/PhysRevLett.124.144501arXiv 2002.03045PMID 32338949
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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