The kinetic limit of a system of coagulating planar Brownian particles

Abstract

We study a model of mass-bearing coagulating planar Brownian particles. Coagulation is prone to occur when two particles become within a distance of order $\epsilon$. We assume that the initial number of particles is of the order of $| \log ε|. Under suitable assumptions on the initial distribution of particles and the microscopic coagulation propensities, we show that the macroscopic particle densities satisfy a Smoluchowski-type equation.

46 pages. The statement of Corollary 1 has been corrected to include a time average. arXiv admin note: text overlap with arXiv:math/0408395

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