A computational fluid dynamics model for the small-scale dynamics of wave, ice floe and interstitial grease ice interaction

Marquart, Rutger, Bogaers, Alfred, Skatulla, Sebastian, Alberello, Alberto, Toffoli, Alessandro, Schwarz, Carina and Vichi, Marcello (2021) A computational fluid dynamics model for the small-scale dynamics of wave, ice floe and interstitial grease ice interaction. Fluids, 6 (5). ISSN 2311-5521

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Abstract

The marginal ice zone is a highly dynamical region where sea ice and ocean waves interact. Large-scale sea ice models only compute domain-averaged responses. As the majority of the marginal ice zone consists of mobile ice floes surrounded by grease ice, finer-scale modelling is needed to resolve variations of its mechanical properties, wave-induced pressure gradients and drag forces acting on the ice floes. A novel computational fluid dynamics approach is presented that considers the heterogeneous sea ice material composition and accounts for the wave-ice interaction dynamics. Results show, after comparing three realistic sea ice layouts with similar concentration and floe diameter, that the discrepancy between the domain-averaged temporal stress and strain rate evolutions increases for decreasing wave period. Furthermore, strain rate and viscosity are mostly affected by the variability of ice floe shape and diameter.

Item Type: Article
Additional Information: Funding Information: Funding: This research has been funded by the National Research Foundation of South Africa (Grant Nos. 104839, 105858 and 118745). Opinions expressed and conclusions arrived at are those of the author and are not necessarily to be attributed to the NRF. R.M., S.S. and M.V. acknowledge support from the South African National Antarctic Programme. A.A. and A.T. acknowledge support from the ACE Foundation–Ferring Pharmaceuticals and the Australian Antarctic Science Program (project 4434). AA is supported by the Japanese Society for the Promotion of Science (PE19055). Funding Information: This research has been funded by the National Research Foundation of South Africa (Grant Nos. 104839, 105858 and 118745). Opinions expressed and conclusions arrived at are those of the author and are not necessarily to be attributed to the NRF. R.M., S.S. and M.V. acknowledge support from the South African National Antarctic Programme. A.A. and A.T. acknowledge support from the ACE Foundation?Ferring Pharmaceuticals and the Australian Antarctic Science Program (project 4434). AA is supported by the Japanese Society for the Promotion of Science (PE19055). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Uncontrolled Keywords: grease ice,marginal ice zone,pancake ice,sea ice dynamics,sea ice rheology,wave-ice interaction,condensed matter physics,mechanical engineering,fluid flow and transfer processes ,/dk/atira/pure/subjectarea/asjc/3100/3104
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Depositing User: LivePure Connector
Date Deposited: 13 Nov 2021 01:51
Last Modified: 15 Nov 2021 01:43
URI: https://ueaeprints.uea.ac.uk/id/eprint/82077
DOI: 10.3390/fluids6050176

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