Speeding chemical reactions by focusing
A. M. Lacasta (1), L. Ramirez-Piscina (1), J. M. Sancho (2), K., Lindenberg (3) ((1) Universitat Politecnica de Catalunya (2) Universitat de, Barcelona (3) University of California San Diego)
TL;DR
This paper demonstrates how focusing colloidal particles with obstacles in a laminar flow can significantly accelerate chemical reactions, approaching the ideal mixing rate.
Contribution
It provides numerical analysis of how obstacle-induced focusing enhances reaction speed, bridging diffusion-limited and perfect mixing regimes.
Findings
Focusing increases reaction rate close to t^{-1}
System parameters significantly influence focusing efficiency
Numerical results validate the speed-up mechanism
Abstract
We present numerical results for a chemical reaction of colloidal particles which are transported by a laminar fluid and are focused by periodic obstacles in such a way that the two components are well mixed and consequently the chemical reaction is speeded up. The roles of the various system parameters (diffusion coefficients, reaction rate, obstacles sizes) are studied. We show that focusing speeds up the reaction from the diffusion limited rate (t to the power -1/2) to very close to the perfect mixing rate, (t to the power -1).
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