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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, meer
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Trefwoord
    Marien/Kust
Author keywords
    sea ice dynamics; wave-ice interaction; marginal ice zone; sea ice rheology; pancake ice; grease ice
Auteurs  Top 
  • Marquart, R.
  • Bogaers, A.
  • Skatulla, S.
  • Alberello, A.
  • Toffoli, A., meer
  • Schwarz, C.
  • Vichi, M.
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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