Field measurement and numerical simulation of snow deposition on an embankment in snowdrift

IF 1.3 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Wind and Structures Pub Date : 2021-05-01 DOI:10.12989/WAS.2021.32.5.453

Wen-jing Ma, Feiqiang Li, Yuanchun Sun, Jianglong Li, Xuanyi Zhou

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引用次数: 4

Abstract

Snow accumulation on the road frequently induces a big traffic problem in the cold snowy region. Accurate prediction on snow distribution is fundamental for solving drifting snow disasters on roads. The present study adopts the transient method to simulate the wind-induced snow distribution on embankment based on the mixture multiphase model and dynamic mesh technique. The simulation and field measurement are compared to confirm the applicability of the simulation. Furthermore, the process of snow accumulation is revealed. The effects of friction velocity and snow concentration on snow accumulation are analyzed to clarify its mechanism. The results show that the simulation agrees well with the field measurement in trends. Moreover, the snow accumulation on the embankment can be approximately divided into three stages with time, the snow firstly deposited on the windward side, then, accumulation occurs on the leeward side which induced by the wake vortex, finally, the snow distribution reaches an equilibrium state with the slope of approximately 7°. The friction velocity and duration have a significant influence on the snow accumulation, and the vortex scale directly affected the snow deposition range on the embankment leeward side.

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雪道路基积雪的现场测量与数值模拟

在寒冷的雪区，道路上的积雪经常引起严重的交通问题。准确预测积雪分布是解决道路漂移雪灾害的基础。本研究采用基于混合多相模型和动态网格技术的瞬态方法模拟路堤风致雪的分布。通过仿真与现场实测对比，验证了仿真的适用性。此外，还揭示了积雪的形成过程。分析了摩擦速度和雪浓度对积雪的影响，阐明了其机理。结果表明，模拟结果与现场实测趋势吻合较好。路堤上的积雪在时间上大致可分为3个阶段，首先在迎风侧堆积，然后在尾流涡的诱导下在背风侧堆积，最后达到一个斜率约为7°的平衡状态。摩擦速度和持续时间对积雪积累有显著影响，涡尺度直接影响路堤背风侧积雪的沉积范围。

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来源期刊

Wind and Structures 工程技术-工程：土木

CiteScore

2.70

自引率

18.80%

发文量

审稿时长

>12 weeks

期刊介绍： The WIND AND STRUCTURES, An International Journal, aims at: - Major publication channel for research in the general area of wind and structural engineering, - Wider distribution at more affordable subscription rates; - Faster reviewing and publication for manuscripts submitted. The main theme of the Journal is the wind effects on structures. Areas covered by the journal include: Wind loads and structural response, Bluff-body aerodynamics, Computational method, Wind tunnel modeling, Local wind environment, Codes and regulations, Wind effects on large scale structures.