基于SPH方法的渤海海冰动力学数值模拟

简要介绍了光滑质点流体动力学 (smoothed particle hydrodynamics,简称SPH) 方法的基本原理,并将此方法应用到渤海海冰动力学数值模拟中. 在对海冰动力学方程和粘弹塑性本构方程进行SPH处理的基础上,对渤海海冰的动力演化过程进行了48 h的数值模拟,得到了海冰厚度、密集度、速度和主应力的演化过程及分布规律,同时对模拟的海冰厚度等值线分布与卫星遥感图像进行了对比分析. 数值模拟结果表明,SPH能够精确地模拟海冰分布规律以及冰缘线的位置,具有很高的计算精度和稳定性,是一种有效的海冰动力学数值模拟方法.

Numerical simulation of sea ice dynamics with SPH approach in Bohai Sea

The numerical approach of smoothed particle hydrodynamics(SPH) was introduced firstly,and then was applied to the simulation of sea ice dynamics in the Bohai Sea.The moment equation and viscoelastic-plastic constitutive model of sea ice dynamics were described using SPH method.The evolution and field distribution of sea ice parameters,such as ice thickness,concentration,velocity and stress,were obtained with the SPH simulation for 48 h in the Bohai Sea.At last,the simulated ice thickness distributions were compared with the satellite images.Numerical results show that the SPH approach can simulate the sea ice distribution and ice edge location with high accuracy and stability,and it is a valid numerical model for sea ice dynamics.