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Lookup NU author(s): Dr Hannah Kreczak, Dr Andrew BaggaleyORCiD, Professor Andrew Willmott
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2023 Elsevier Ltd. When using mathematical models to predict the pathways of biofouled microplastic in the ocean, it is necessary to parametrise the impact of turbulence on their motions. In this paper, statistics on particle motion have been computed from simulations of small, spherical particles with time-dependent mass in cellular flow fields. The cellular flows are a prototype for Langmuir circulation and flows dominated by vortical motion. Upwelling regions lead to particle suspension and particles fall out at different times. The uncertainty of fallout time and a particle's vertical position is quantified across a range of parameters. A slight increase in settling velocities, for short times, is observed for particles with inertia due to clustering in fast downwelling regions for steady, background flow. For particles in time-dependent, chaotic flows, uncertainty is significantly reduced and we observe no significant increase in the average settling rates due to inertial effects.
Author(s): Kreczak H, Baggaley AW, Willmott AJ
Publication type: Article
Publication status: Published
Journal: Marine Pollution Bulletin
Year: 2023
Volume: 189
Print publication date: 01/04/2023
Online publication date: 26/02/2023
Acceptance date: 09/02/2023
Date deposited: 20/03/2023
ISSN (print): 0025-326X
ISSN (electronic): 1879-3363
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.marpolbul.2023.114729
DOI: 10.1016/j.marpolbul.2023.114729
ePrints DOI: 10.57711/k6jt-kh33
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