Abstract
We present a direct simulation of a reacting dilute mixture, for which the corresponding rate equations for the concentrations display a limit cycle behavior when the system is forced out of equilibrium by an external mass current. The time dependent concentrations computed in the simulation compare well with the solutions of the macroscopic rate equations. We also find agreement between the microscopic simulations results and a Langevin description for what concerns the concentration fluctuations in the system below and beyond the bifurcation point.
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