Hydrodynamic Limit of a Boundary-Driven Elastic Exclusion Process and a Stefan Problem

Details Hydrodynamic Limit of a Boundary-Driven Elastic Exclusion Process and a Stefan Problem Hydrodynamic Limit of a Boundary-Driven Elastic Exclusion Process and a Stefan Problem

2011-10-05

arxiv.org/abs/1110.1058v2

Mathematics

Probability

31 pages

Scientific paper

Burdzy, Pal, and Swanson considered solid spheres of small radius moving in the unit interval, reflecting instantaneously from each other and at x=0, and killed at x=1, with mass being added to the system from the left at constant rate. By transforming to a system with zero-width particles moving as independent Brownian motion, they derived a limiting stationary distribution for a particular initial distribution, as the width of a particle decreases to zero and the number of particles increases to infinity. This space-removing transformation has a direct analogy in the isomorphism between a new unbounded-range exclusion process and a superimposition of random walks with random boundary. We derive the hydrodynamic limit for these isomorphic processes, demonstrating that this elastic exclusion is an appropriate model for the reflecting Brownian spheres in one dimension.

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