hal-04002707
https://hal.science/hal-04002707
https://hal.science/hal-04002707/document
https://hal.science/hal-04002707/file/FKS.pdf
arxiv:2302.12099
[CNRS] CNRS - Centre national de la recherche scientifique
[UNIV-DAUPHINE] Université Paris Dauphine - Paris IX
[INSMI] CNRS-INSMI - INstitut des Sciences Mathématiques et de leurs Interactions
[CEREMADE] CEntre de REcherches en MAthématiques de la DEcision
[PSL] Université Paris sciences et lettres
[UNIV-DAUPHINE-PSL] Université Paris Dauphine - PSL
ONE-DIMENSIONAL SHORT-RANGE NEAREST-NEIGHBOR INTERACTION AND ITS NONLINEAR DIFFUSION LIMIT
Fischer, M
Kanzler, L
Schmeiser, C
[MATH] Mathematics [math]
UNDEFINED
agent-based models
repulsive force
cell-exclusion
nonlinear diffusion limit
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.
2023-02-23
2023-02-23
en