Partially Reflected Brownian Motion: A Stochastic Approach to Transport Phenomena

Details Partially Reflected Brownian Motion: A Stochastic Approach to Transport Phenomena Partially Reflected Brownian Motion: A Stochastic Approach to Transport Phenomena

Publishing date

2006-10-02

URL

arxiv.org/abs/math/0610080v1

Journals

D. S. Grebenkov, in "Focus on Probability Theory", Ed. L. R. Velle, pp. 135-169 (Nova Science Publishers, 2006)

Science

Mathematics

Field

Probability

Type

Scientific paper

Abstract

Transport phenomena are ubiquitous in nature and known to be important for various scientific domains. Examples can be found in physics, electrochemistry, heterogeneous catalysis, physiology, etc. To obtain new information about diffusive or Laplacian transport towards a semi-permeable or resistive interface, one can study the random trajectories of diffusing particles modeled, in a first approximation, by the partially reflected Brownian motion. This stochastic process turns out to be a convenient mathematical foundation for discrete, semi-continuous and continuous theoretical descriptions of diffusive transport. This paper presents an overview of these topics with a special emphasis on the close relation between stochastic processes with partial reflections and Laplacian transport phenomena. We give selected examples of these phenomena followed by a brief introduction to the partially reflected Brownian motion and related probabilistic topics (e.g., local time process and spread harmonic measure). A particular attention is paid to the use of the Dirichlet-to-Neumann operator. Some practical consequences and further perspectives are discussed.

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