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论文类型：会议论文

发表时间：2011-07-10

收录刊物：EI、Scopus

卷号：2

页面范围：1109-1117

摘要：Considering the non-continuous characteristics of sea ice at various scales, a modified discrete element model (DEM) was developed for sea ice dynamics based on granular material rheology. In this modified DEM, a soft sea ice particle is introduced with the ability of self-adjusting the particle size. Each ice particle is treated as an assembly of ice floes, and its concentration and thickness is adapted with the size change of ice particle under the mass conservation. The contact force among ice particles is calculated using a viscous-elastic model, while the maximum shear force is governed by the Mohr-Coulomb friction law. With this modified DEM, the ice flow dynamics in a channel are simulated with various widths under the drag of wind and current, the concentrations and velocities of ice particles are obtained, and reasonable dynamic process is analyzed. Moreover, the sea ice dynamic process in a vortex wind field is simulated to compare with the simulated results from particle-in-cell (PIC) method. With the consideration of the influence of thermodynamics, this modified DEM will be improved in the next study. Copyright ? (2011) by Port and Ocean Engineering under Arctic Conditions (POAC 2011).