A Geometrical Method for the Smoluchowski Equation on the Sphere
Abstract
A study of the diffusion of a passive Brownian particle on the surface of a sphere and subject to the effects of an external potential, coupled linearly to the probability density of the particle's position, is presented through a numerical algorithm devised to simulate the trajectories of an ensemble of Brownian particles. The algorithm is based on elementary geometry and practically only algebraic operations are used, which makes the algorithm efficient and simple, and converges, in the \textit{weak sense}, to the solutions of the Smoluchowski equation on the sphere. Our findings show that the global effects of curvature are taken into account in both the time dependent and stationary processes.
Cite
@article{arxiv.2104.02843,
title = {A Geometrical Method for the Smoluchowski Equation on the Sphere},
author = {Adriano Valdés Gómez and Francisco J. Sevilla},
journal= {arXiv preprint arXiv:2104.02843},
year = {2021}
}
Comments
Diffusion of a Brownian particle on the sphere surface under external potentials. 11 pages, 8 figures