One-dimensional short-range nearest-neighbor interaction and its nonlinear diffusion limit
Fischer, Matthias; KANZLER, LAURA; Schmeiser, Christian (2023), One-dimensional short-range nearest-neighbor interaction and its nonlinear diffusion limit. https://basepub.dauphine.psl.eu/handle/123456789/24887
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Type
Document de travail / Working paperExternal document link
https://hal.science/hal-04002707Date
2023Series title
Cahier de recherche CEREMADE, Université Paris Dauphine-PSLPublished in
Paris
Pages
15
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Show full item recordAuthor(s)
Fischer, MatthiasKarl-Franzens-Universität Graz
Universität Wien
KANZLER, LAURA
CEntre de REcherches en MAthématiques de la DEcision [CEREMADE]
Schmeiser, Christian
Fakultät für Mathematik [Wien]
Abstract (EN)
Repulsion between individuals within a finite radius is encountered in numerous applications, including cell exclusion, i.e. an overlap of cells to be avoided, bird flocks, or microscopic pedestrian models. We define such individual based particle dynamics in one spatial dimension with minimal assumptions of the repulsion force f and prove their characteristic properties. Moreover, we are able to perform a rigorous limit from the microscopic-to the macroscopic scale, where we could recover the finite interaction radius as a density threshold. Specific choices for the repulsion force f lead to well known nonlinear diffusion equations on the macroscopic scale, as e.g. the porous medium equation. At both scaling levels numerical simulations are presented and compared to underline the analytical results. We discuss the possible applications of this new diffusion term.Subjects / Keywords
agent-based models; repulsive force; cell-exclusion; nonlinear diffusion limitRelated items
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