Snowstorm disasters seriously endanger human life and the social economy. In order to find out the influence of the sublimation of snow on motion characteristic of snow-wind flow, based on Smoothed Particle Hydrodynamics (SPH), this paper simulates motion to propose the method and basic theory of the SPH model of snow-wind flow. The basic idea of the SPH method is to decompose the computational domain into independent particles. These computational particles carry their physical properties. And it can move with the governing equations, which is consistent with the discrete nature of snow particles. According to the advantages of the SPH method and the characteristics of snow flow, this paper improves and rectifies SPH theory, so that SPH shows its unique advantages in dealing with the coupling of two substances in the snow two-phase flow. This new model can able to achieving two functions: moisture diffusion and snow particle physical properties change with time and environment. And it can dynamically display the movement state of the salting snow particles of the whole snow-wind flow process to obtain each particle's speed, trajectory, and mass change. In this paper, the dynamic characteristics of snow particle swarm motion behavior are obtained through the microscopic analysis of a single snow particle motion physical quantity.

雪灾灾害严重危害人类生命和社会经济。为了找出雪的升华对雪风流运动特性的影响，基于平滑粒子流体动力学(SPH)，对运动进行模拟，提出了雪风流SPH模型的方法和基本理论。 。SPH方法的基本思想是将计算域分解为独立的粒子。这些计算粒子具有它们的物理特性。并且它可以随控制方程运动，这与雪粒子的离散性质是一致的。本文根据SPH方法的优点和雪流的特点，对SPH理论进行了改进和修正，使SPH在处理雪两相流中两种物质的耦合方面显示出其独特的优势。这个新模型能够实现两个功能：水分扩散和雪粒物理特性随时间和环境的变化。并能动态显示整个雪风流过程中盐化雪颗粒的运动状态，获取每个颗粒的速度、轨迹和质量变化。本文通过对单个雪粒运动物理量的微观分析，获得雪粒群运动行为的动态特征。