考虑摩擦速度修正的风致积雪重分布模拟方法研究

发布时间：2018-06-15 18:00

  本文选题：拉格朗日法 + 壁面摩擦速度　； 参考：《工程力学》2017年10期

【摘要】：采用拉格朗日方法模拟了风致积雪漂移现象,在数值模拟中考虑了颗粒运动后质量浓度对雪层表面摩擦速度的修正。以立方体周围积雪重分布为例,考虑了摩擦速度修正与否对模拟结果的影响。在低风速下,考虑摩擦速度修正对模拟结果的影响不显著。在高风速下考虑摩擦速度修正后,立方体附近颗粒较多的马蹄形区域内摩擦速度与质量浓度的变化最为显著。风速越高,计算域中雪粒总数的减少幅度越大,计算域内的侵蚀或沉积质量通量也越大。
[Abstract]:The phenomenon of wind-induced snow drift was simulated by Lagrangian method. In the numerical simulation, the modification of the surface friction velocity of snow layer by mass concentration after particle movement was taken into account. Taking the snow redistribution around the cube as an example, the effect of friction velocity correction on the simulation results is considered. At low wind speed, the effect of friction velocity correction on the simulation results is not significant. After considering the friction velocity correction at high wind speed, the variation of friction velocity and mass concentration in the horseshoe region with more particles near the cube is most significant. The higher the wind speed is, the greater the reduction of the total amount of snow particles in the computational domain is, and the larger the erosion or sediment mass flux in the calculated domain is.
【作者单位】： 同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金面上项目(51478359,51778492) 科技部国家重点实验室基金项目(SLDRCE14-B-10)
【分类号】：TU312.1
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本文编号：2022973