Approximating particle-based clustering dynamics by stochastic PDEs
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866915111838416896 |
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| author | Wehlitz, Nathalie Sadeghi, Mohsen Montefusco, Alberto Schütte, Christof Pavliotis, Grigorios A. Winkelmann, Stefanie |
| author_facet | Wehlitz, Nathalie Sadeghi, Mohsen Montefusco, Alberto Schütte, Christof Pavliotis, Grigorios A. Winkelmann, Stefanie |
| contents | This work proposes stochastic partial differential equations (SPDEs) as a practical tool to replicate clustering effects of more detailed particle-based dynamics. Inspired by membrane-mediated receptor dynamics on cell surfaces, we formulate a stochastic particle-based model for diffusion and pairwise interaction of particles, leading to intriguing clustering phenomena. Employing numerical simulation and cluster detection methods, we explore the approximation of the particle-based clustering dynamics through mean-field approaches. We find that SPDEs successfully reproduce spatiotemporal clustering dynamics, not only in the initial cluster formation period, but also on longer time scales where the successive merging of clusters cannot be tracked by deterministic mean-field models. The computational efficiency of the SPDE approach allows us to generate extensive statistical data for parameter estimation in a simpler model that uses a Markov jump process to capture the temporal evolution of the cluster number. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_18952 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Approximating particle-based clustering dynamics by stochastic PDEs Wehlitz, Nathalie Sadeghi, Mohsen Montefusco, Alberto Schütte, Christof Pavliotis, Grigorios A. Winkelmann, Stefanie Quantitative Methods Probability 35R60, 35R09, 35Q70, 65C35, 35B36 This work proposes stochastic partial differential equations (SPDEs) as a practical tool to replicate clustering effects of more detailed particle-based dynamics. Inspired by membrane-mediated receptor dynamics on cell surfaces, we formulate a stochastic particle-based model for diffusion and pairwise interaction of particles, leading to intriguing clustering phenomena. Employing numerical simulation and cluster detection methods, we explore the approximation of the particle-based clustering dynamics through mean-field approaches. We find that SPDEs successfully reproduce spatiotemporal clustering dynamics, not only in the initial cluster formation period, but also on longer time scales where the successive merging of clusters cannot be tracked by deterministic mean-field models. The computational efficiency of the SPDE approach allows us to generate extensive statistical data for parameter estimation in a simpler model that uses a Markov jump process to capture the temporal evolution of the cluster number. |
| title | Approximating particle-based clustering dynamics by stochastic PDEs |
| topic | Quantitative Methods Probability 35R60, 35R09, 35Q70, 65C35, 35B36 |
| url | https://arxiv.org/abs/2407.18952 |