| LI Baohui,LI Hai,LIU Yu,WANG Anliang,JI Shunying. 2014. Amodified discrete element model for sea ice dynamics. Acta Oceanologica Sinica, 33(1):56－63 |
| Amodified discrete element model for sea ice dynamics |
| Amodified discrete element model for sea ice dynamics |
| Received:September 21, 2010 Revised:March 11, 2011 |
| DOI：10.1007/s13131-014-0428-3 |
| Key words:sea ice dynamics modified discrete element model contact forcemodel numerical simulation |
| 中文关键词: sea ice dynamics modified discrete element model contact forcemodel numerical simulation |
| 基金项目:Special Fund of Marine Commonweal Industry under contact Nos 201105016 and 201205007, supported by National Marine Environment Forecasting Centre; the National Natural Science Foundation of China under contact No. 41176012. |
| Author Name | Affiliation | E-mail | | LI Baohui | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Key Laboratory of Ocean Circulation and Waves (KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China
Graduate School of Chinese Academy of Sciences, Beijing 100039, China
National Marine Environment Forecast Center, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Research on Marine Hazards Forecasting, State Oceanic Administration, Beijing 100081, China | | | LI Hai | National Marine Environment Forecast Center, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Research on Marine Hazards Forecasting, State Oceanic Administration, Beijing 100081, China | | | LIU Yu | National Marine Environment Forecast Center, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Research on Marine Hazards Forecasting, State Oceanic Administration, Beijing 100081, China | | | WANG Anliang | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China | | | JI Shunying | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China | jisy@dlut.edu.cn |
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| Abstract: |
| Considering the discontinuous characteristics of sea ice on various scales, amodified discrete elementmodel (DEM) for sea ice dynamics is developed based on the granular material rheology. In this modified DEM, a soft sea ice particle element is introduced as a self-adjustive particle size function. Each ice particle can be treated as an assembly of ice floes, with its concentration and thickness changing to variable sizes under the conservation of mass. In this model, the contact forces among ice particles are calculated using a viscous-elastic-plasticmodel, while themaximum shear forces are described with the Mohr-Coulomb friction law. With this modified DEM, the ice flow dynamics is simulated under the drags of wind and current in a channel of various widths. The thick nesses, concentrations and velocities of ice particles are obtained, and then reasonable dynamic process is analyzed. The sea ice dynamic process is also simulated in a vortex wind field. Taking the influence of thermodynamics into account, this modified DEM will be improved in the future work. |
| 中文摘要: |
| Considering the discontinuous characteristics of sea ice on various scales, amodified discrete elementmodel (DEM) for sea ice dynamics is developed based on the granular material rheology. In this modified DEM, a soft sea ice particle element is introduced as a self-adjustive particle size function. Each ice particle can be treated as an assembly of ice floes, with its concentration and thickness changing to variable sizes under the conservation of mass. In this model, the contact forces among ice particles are calculated using a viscous-elastic-plasticmodel, while themaximum shear forces are described with the Mohr-Coulomb friction law. With this modified DEM, the ice flow dynamics is simulated under the drags of wind and current in a channel of various widths. The thick nesses, concentrations and velocities of ice particles are obtained, and then reasonable dynamic process is analyzed. The sea ice dynamic process is also simulated in a vortex wind field. Taking the influence of thermodynamics into account, this modified DEM will be improved in the future work. |
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