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- W2017294997 abstract "The evolution of an imperfectly mixed system---mimicked in terms of a distribution of lamellae---is studied. Two reactants A and B, initially placed in alternate striations, diffuse and undergo a reaction A+Bensuremath{rightarrow}2P with intrinsic rate r=${mathit{k}}_{mathit{r}}$(${mathit{c}}_{mathit{A}}$${mathit{c}}_{mathit{B}}$${)}^{mathrm{ensuremath{alpha}}}$. Simulations, scaling analysis, and space-averaged (fractal) kinetics are used to study the evolution of the system for different values of ensuremath{alpha} and ${mathit{k}}_{mathit{r}}$. For ensuremath{alpha}=1 and short times, a model based on the dynamics of reaction for a single lamella with infinite neighbors predicts the overall rate of reaction. For ensuremath{alpha}2.5, diffusion takes control of the dynamics for moderate to large times, and the kinetic parameters become irrelevant. Under these conditions, critical self-organization determines the behavior of the system, and the spatial structure evolves into a self-similar form that is independent of both ${mathit{k}}_{mathit{r}}$ and initial conditions. En route to scaling, the system undergoes two independent transitions: (i) from intrinsic chemical kinetics control to diffusion control, and (ii) from a system with several characteristic lengths to a system with only one characteristic length; these transitions might occur in any order, depending on controlling parameters. A combination of both short- and long-time regimes gives an efficient prediction for the average concentration of reactants for all times." @default.
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- W2017294997 title "Diffusion and reaction in a lamellar system: Self-similarity with finite rates of reaction" @default.
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- W2017294997 doi "https://doi.org/10.1103/physreva.42.5873" @default.
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