| Modified PIC Method for Sea Ice Dynamics |
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| 作者姓名： | 王瑞学 季顺迎 SHEN Hung-tao 岳前进 |
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| 作者单位： | [1]State Key Laboratory of Structural Analysis for Industrial Equipment, Dcdian University of Technology, Dalian 116023, China [2]Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USA |
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| 基金项目： | This study was financially supported by the National Natural Science Foundation of China （Grant No. 40206004） |
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| 摘 要： | The sea ice cover displays various dynamical characteristics such as breakup, rafting, and ridging under external forces. To model the ice dynamic process accurately, the effective numerical modeling method should be established. In this paper, a modified particle-in-cell （PIC） method for sea ice dynamics is developed coupling the finite difference （FD） method and smoothed particle hydrodynamics （SPH）. In this method, the ice cover is first discretized into a series of lagrangian ice particles which have their own sizes, thicknesses, concentrations and velocities. The ice thickness and concentration at Eulerian grid positions are obtained by interpolation with the Gaussian function from their surrounding ice particles. The momentum of ice cover is solved with FD approach to obtain the Eulerian cell velocity, which is used to estimate the ice particle velocity with the Gaussian function also. The thickness and concentration of ice particles are adjnsted with particle mass density and smooth length, which are adjusted with the redistribution of ice particles. With the above modified PIC method, numerical simulations for ice motion in an idealized rectangular basin and the ice dynamics in the Bohai Sea are carried out. These simulations show that this modified PIC method is applicable to sea ice dynamics simulation.
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| 关 键 词： | 海冰 动力学分析 PIC 数值模拟 FD |
Modified PIC Method for Sea Ice Dynamics |
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| WANG Rui-xue, JI Shun-ying, SHEN Hung-tao, YUE Qian-jin.Modified PIC Method for Sea Ice Dynamics[J].China Ocean Engineering,2005,19(3):457-468. |
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| Authors: | WANG Rui-xue JI Shun-ying SHEN Hung-tao YUE Qian-jin |
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| Abstract: | The sea ice cover displays various dynamical characteristics such as breakup, rafting, and ridging under external forces. To model the ice dynamic process accurately, the effective numerical modeling method should be established. In this paper, a modified particle-in-cell (PIC) method for sea ice dynamics is developed coupling the finite difference (FD) method and smoothed particle hydrodynamics (SPH). In this method, the ice cover is first discretized into a series of Lagrangian ice particles which have their own sizes, thicknesses, concentrations and velocities. The ice thickness and concentration at Eulerian grid positions are obtained by interpolation with the Gaussian function from their surrounding ice particles. The momentum of ice cover is solved with FD approach to obtain the Eulerian cell velocity, which is used to estimate the ice particle velocity with the Gaussian function also. The thickness and concentration of ice particles are adjusted with particle mass density and smooth length, which are adjusted with the redistribution of ice particles. With the above modified PIC method, numerical simulations for ice motion in an idealized rectangular basin and the ice dynamics in the Bohai Sea are carried out. These simulations show that this modified PIC method is applicable to sea ice dynamics simulation. |
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| Keywords: | particle-in-cell smoothed particle hydrodynamics sea ice dynamics numerical simulation |
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