A computational fluid dynamics model for the small-scale dynamics of wave, ice floe and interstitial grease ice interaction
Marquart, R.; Bogaers, A.; Skatulla, S.; Alberello, A.; Toffoli, A.; Schwarz, C.; Vichi, M. (2021). A computational fluid dynamics model for the small-scale dynamics of wave, ice floe and interstitial grease ice interaction. Fluids 6(5): 176. https://dx.doi.org/10.3390/fluids6050176
In: Fluids. e-ISSN 2311-5521, more
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| Keyword |
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| Author keywords |
sea ice dynamics; wave-ice interaction; marginal ice zone; sea ice rheology; pancake ice; grease ice |
| Authors | | Top |
- Marquart, R.
- Bogaers, A.
- Skatulla, S.
- Alberello, A.
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- Toffoli, A., more
- Schwarz, C.
- Vichi, M.
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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. |
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