| JI Shunying,LI Hai,SHEN Hung Tao,WANG Ruixue,YUE Qianjin. 2007. A hybrid Lagrangian-Eulerian numerical model for sea-ice dynamics. Acta Oceanologica Sinica, (5):12－24 |
| A hybrid Lagrangian-Eulerian numerical model for sea-ice dynamics |
| A hybrid Lagrangian-Eulerian numerical model for sea-ice dynamics |
| Received:August 18, 2006 Revised:January 13, 2007 |
| DOI： |
| Key words:hybrid Lagrangian-Eulerian model sea-ice dynamics numerical model |
| 中文关键词: hybrid Lagrangian-Eulerian model sea-ice dynamics numerical model |
| 基金项目: |
| Author Name | Affiliation | E-mail | | JI Shunying | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China | jisy@dlut.edu.cn | | LI Hai | National Marine Environment Forecast Center, Beijing 100081, China | | | SHEN Hung Tao | Department of Civil and Environmental Engineering, Clarkson University, New York 13699-5710, USA | | | WANG Ruixue | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
Department of Civil and Environmental Engineering, Clarkson University, New York 13699-5710, USA | | | YUE Qianjin | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China | |
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| Abstract: |
| A hybrid Lagrangian-Eulerian (HLE) method is developed for sea ice dynamics, which combines the high computational efficiency of finite difference method (FDM) with the high numerical accuracy of smoothed particle hydrodynamics (SPH).In this HLE model, the sea ice cover is represented by a group of Lagrangian ice particles with their own thicknesses and concentrations.These ice variables are interpolated to the Eularian gird nodes using the Gaussian interpolation function.The FDM is used to determine the ice velocities at Eulerian grid nodes, and the velocities of Lagrangian ice particles are interpolated from these grid velocities with the Gaussian function also.The thicknesses and concentrations of ice particles are determined based on their new locations.With the HLE numerical model, the ice ridging process in a rectangular basin is simulated, and the simulated results are validated with the analytical solution.This method is also applied to the simulation of sea ice dynamics in a vortex wind field.At last, this HLE model is applied to the Bohai Sea, and the simulated concentration, thickness and velocity match the satellite images and the field observed data well. |
| 中文摘要: |
| A hybrid Lagrangian-Eulerian (HLE) method is developed for sea ice dynamics, which combines the high computational efficiency of finite difference method (FDM) with the high numerical accuracy of smoothed particle hydrodynamics (SPH).In this HLE model, the sea ice cover is represented by a group of Lagrangian ice particles with their own thicknesses and concentrations.These ice variables are interpolated to the Eularian gird nodes using the Gaussian interpolation function.The FDM is used to determine the ice velocities at Eulerian grid nodes, and the velocities of Lagrangian ice particles are interpolated from these grid velocities with the Gaussian function also.The thicknesses and concentrations of ice particles are determined based on their new locations.With the HLE numerical model, the ice ridging process in a rectangular basin is simulated, and the simulated results are validated with the analytical solution.This method is also applied to the simulation of sea ice dynamics in a vortex wind field.At last, this HLE model is applied to the Bohai Sea, and the simulated concentration, thickness and velocity match the satellite images and the field observed data well. |
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