Fagan, Brennen orcid.org/0000-0002-8451-920X, MacKay, Niall orcid.org/0000-0003-3279-4717 and Wood, A. Jamie orcid.org/0000-0002-6119-852X (2024) Robustness of steady state and stochastic cyclicity in generalized coalescence-fragmentation models. European physical journal b. 21. ISSN 1434-6028
Abstract
Processes of coalescence and fragmentation are used to understand the time-evolution of the mass distribution of various systems and may result in a steady state or in stable deterministic or stochastic cycles. Motivated by applications in insurgency warfare we investigate coalescence-fragmentation systems. We begin with a simple model of size-biased coalescence accompanied by shattering into monomers. Depending on the parameters this model has an approximately power-law-distributed steady state or stochastic cycles of alternating gelation and shattering. We conduct stochastic simulations of this model and its generalizations to include different kernel types, accretion and erosion, and various distributions of non-shattering fragmentation. Our central aim is to explore the robustness of the steady state and gel-shatter stochastic cycles to these variations. We show that an approximate power-law steady state persists with the addition of accretion and erosion, and with partial rather than total shattering. However, broader distributions of fragment sizes typically vitiate both the power law steady state and gel-shatter cyclicity. This work clarifies features shown in coalescence/fragmentation model simulations and elucidates the relationship between the microscopic dynamics and observed phenomena in this widely applicable interdisciplinary model type.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2024 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Mathematics (York) The University of York > Faculty of Sciences (York) > Biology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 05 Feb 2024 12:50 |
Last Modified: | 02 Nov 2024 01:26 |
Published Version: | https://doi.org/10.1140/epjb/s10051-024-00654-y |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1140/epjb/s10051-024-00654-y |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:208716 |
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Description: Robustness of steady state and stochastic cyclicity in generalized coalescence-fragmentation models
Licence: CC-BY 2.5