Study on movement characteristics of snow-wind flow based on SPH method
Study on movement characteristics of snow-wind flow based on SPH method
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DOI：
10.1016/j.polar.2023.100965
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发表时间：
2023-06
期刊：
影响因子：
1.8
通讯作者：
Shuzhi Zhang;A. Jin;Yong Dai
中科院分区：
文献类型：
--
作者：
Shuzhi Zhang;A. Jin;Yong Dai
雪灾严重危害人类生命和社会经济。为了了解雪的升华对风雪流运动特性的影响，基于光滑粒子流体动力学（SPH）理论，对风雪流运动进行了模拟，提出了风雪流SPH模型的建立方法和基本理论。SPH方法的基本思想是将计算区域分解为独立的粒子。这些计算粒子带有它们的物理属性。而且它可以随着控制方程运动，这与雪粒子的离散性是一致的。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在处理雪流两相流中两种物质的耦合问题时显示出其独特的优势。该模型能够实现水分扩散和雪粒子物理性质随时间和环境变化的两个功能。它可以动态显示整个风雪流过程中盐渍雪粒子的运动状态，得到每个粒子的速度、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，得到了雪粒群运动行为的动力学特征。
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.