Abstract Snow redistribution caused by snowdrift may worsen the traffic condition of bridge decks in snowy regions, hence it needs to be considered in bridge designs. In this study, a quasi-steady numerical method is adopted to simulate snowdrift on a typical bridge deck with barriers. The whole process of snowdrift on bridge decks is divided into several phases to simulate the variation in profile of snowpack, and a two-dimensional (2D) steady Computational Fluid Dynamics (CFD) simulation method is employed in each phase. To investigate the effect of barriers on the snow redistribution on bridge decks, the simulation results of wind velocity field, wall friction velocity, snow concentration field and snow redistributions are analyzed in detail. Generally, as the barrier porosity decreases, the total amount of snow erosion decreases due to the blocking effect of the barrier, but the decrease is limited when the barrier porosity is below 37.5%. Heavy snow accumulation mainly occurs behind the windward barrier when the barrier porosity is below 62.5%. To avoid snow accumulation, barrier porosity above 75% is suggested as the optimal choice for improving the traffic condition of bridge decks.

中文翻译：

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桥面雪重新分布的 CFD 模拟：不同孔隙率障碍的影响

摘要 雪堆引起的积雪重新分布可能会恶化雪区桥面的交通状况，因此需要在桥梁设计中加以考虑。在这项研究中，采用准稳态数值方法来模拟典型的有障碍桥面板上的积雪。桥面积雪的整个过程分为几个阶段来模拟积雪剖面的变化，每个阶段都采用二维（2D）稳态计算流体动力学（CFD）模拟方法。为研究障碍物对桥面积雪再分布的影响，详细分析了风速场、壁面摩擦速度、积雪浓度场和积雪再分布的模拟结果。一般来说，随着阻隔孔隙率的降低，由于屏障的阻挡作用，雪侵蚀总量减少，但当屏障孔隙率低于37.5%时，减少有限。当屏障孔隙率低于62.5%时，大积雪主要发生在迎风屏障后面。为避免积雪，建议75%以上的屏障孔隙率作为改善桥面通行条件的最佳选择。