The Diffusion Mechanism of Snowfall Based on Multi-physical Field Coupling

CHEN Wei; GAN Lin; ZHANG He; LIU Shenjun; YAN Jingdong; ZHOU Junjun

doi:10.12382/bgxb.2025.0361

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The Diffusion Mechanism of Snowfall Based on Multi-physical Field Coupling

更新时间：2026-04-24

- The Diffusion Mechanism of Snowfall Based on Multi-physical Field Coupling
- Acta Armamentarii Vol. 47, Issue 3, Pages: 250361(2026)
- 作者机构：
  
  南京理工大学智能弹药技术国防重点学科实验室，江苏南京 210094
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0361
  CLC： TJ43+9.2
- Received：12 May 2025，
  
  Online First：10 February 2026，
  
  Published：2026-03
- 稿件说明：
移动端阅览
CHEN Wei, GAN Lin, ZHANG He, et al. The Diffusion Mechanism of Snowfall Based on Multi-physical Field Coupling[J]. Acta Armamentarii, 2026, 47(3): 250361.
DOI：

CHEN Wei, GAN Lin, ZHANG He, et al. The Diffusion Mechanism of Snowfall Based on Multi-physical Field Coupling[J]. Acta Armamentarii, 2026, 47(3): 250361. DOI： 10.12382/bgxb.2025.0361.

摘要

针对不同风场环境下雪粒子扩散对激光引信传输特性的干扰问题，基于空气动力学理论建立了降雪粒子扩散运动特性的仿真模型。通过将风速矢量分解至三维坐标系，构建了包含空气阻力项、风力驱动项及湍流扰动项的多物理场耦合运动控制方程。利用高速摄像系统在稳定降雪条件下开展现场观测实验，获取了风速分别为2m/s（微风）、10 m/s（强风）和15m/s（疾风）三种典型工况下的雪粒子空间分布数据。实验与模拟数据对比分析表明：雪粒子群平均浓度分布受风场与降雪强度的双重调控，风速由[2m/s 3m/s 0m/s]增大至[6m/s 7m/s 0m/s]，粒子团中心浓度衰减速率提升48.59%，其扩散过程表现出显著的时间依赖性与空间各向异性；水平扩散半径与作用时间呈指数型非线性关系，垂直沉降速度则由空气阻力机制主导。

Abstract

Aiming at the interference of snow particle diffusion on the transmission characteristics of laser fuze in different wind field environments

a simulation model for the diffusion movement characteristics of snowfall particles is established based on aerodynamic theory. A multi-physical field coupled motion control equation

containing air resistance term

wind power driving term and turbulence disturbance term

is constructed by decomposing the wind speed vector into a three-dimensional coordinate system. The on-site observation experiment is conducted using a high-speed camera system under stable snowfall conditions. The spatial distribution data of snow particles under three typical working conditions of wind speed of 2 m/s（light wind）

10 m/s（strong wind）and 15 m/s（violent wind）is obtained through observation experiment. Comparative analysis of experimental and simulated data shows that the average concentration distribution of snow particles is regulated by both wind field and snowfall intensity

and the decay rate of the concentration in the centre of particle cluster increases by 48.59% when the wind speed increases from [2 m/s 3 m/s 0 m/s] to [6 m/s 7 m/s 0 m/s]. The diffusion process of particle cluster shows significant time-dependence and spatial anisotropy. The horizontal diffusion radius shows an exponential nonlinear relationship with the action time

while the vertical settling rate is dominated by the air resistance mechanism.

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references

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