ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We consider the kinetics of the two-dimensional, stoichiometric A+B→0 reaction under external flows, for which we use two models: First a steady flow, which consists of an array of eddies; second a time-dependent, stochastic flow which mimics turbulent fluid motion. We follow the reaction numerically and detect in both situations complex decay patterns, which obey different power-laws at short, intermediate and long times: While the initial stage of the reaction is dominated by mixing, c(t)∝t−1, the long-time behavior shows fluctuation-dominated kinetics, c(t)∝t−1/2. In the case of the eddy-lattice-flow a very slow intermediate regime, with c(t)∝t−1/4, emerges. This regime is explained in the framework of an analytical model for mixing along closed-flow lines. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.472896
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