周晅毅, 谭敏海, 晏克勤, 顾明, 胡学富. 风致积雪重分布的拉格朗日方法与现场实测研究[J]. 工程力学, 2017, 34(2): 21-27. DOI: 10.6052/j.issn.1000-4750.2015.07.0573
引用本文: 周晅毅, 谭敏海, 晏克勤, 顾明, 胡学富. 风致积雪重分布的拉格朗日方法与现场实测研究[J]. 工程力学, 2017, 34(2): 21-27. DOI: 10.6052/j.issn.1000-4750.2015.07.0573
ZHOU Xuan-yi, TAN Min-hai, YAN Ke-qin, GU Ming, HU Xue-fu. LAGRANGIAN METHOD MODELING AND FIELD MEASUREMENT ON SNOWRIFT[J]. Engineering Mechanics, 2017, 34(2): 21-27. DOI: 10.6052/j.issn.1000-4750.2015.07.0573
Citation: ZHOU Xuan-yi, TAN Min-hai, YAN Ke-qin, GU Ming, HU Xue-fu. LAGRANGIAN METHOD MODELING AND FIELD MEASUREMENT ON SNOWRIFT[J]. Engineering Mechanics, 2017, 34(2): 21-27. DOI: 10.6052/j.issn.1000-4750.2015.07.0573

风致积雪重分布的拉格朗日方法与现场实测研究

LAGRANGIAN METHOD MODELING AND FIELD MEASUREMENT ON SNOWRIFT

  • 摘要: 采用拉格朗日方法,模拟了立方体周围积雪重分布的情况,同时在东北地区利用真实的雪颗粒对立方体周围积雪重分布进行了现场实测。将数值模拟和现场实测结果进行比较,两者在整体趋势上吻合较好。在立方体前方处均发生积雪沉积;在立方体侧边迎风端出现积雪侵蚀;在立方体的背风区,侵蚀量较小。由于该文的数值模拟方法未考虑横风向风速对雪粒的作用,在立方体迎风前方的底部,数值模拟方法的结果与实测有一定的差异。该文还分析了数值模拟中的雪颗粒阈值摩擦速度对积雪沉积侵蚀的影响。

     

    Abstract: The re-distribution of snow around a cube is modelled through the Lagrangian method. Real snow particles are also used during field measurements in the northeast region of China. The results of the numerical simulation are compared with those from the field measurements, and the results are found to agree with each other in trend. Snow deposition occurs in front of the cube and snow erosion is found at windward sides. Small amounts of snow deposition are observed in the leeward region of cube. Since the crosswind is not considered in the numerical simulation, the results of the numerical simulation were found to be very different from those from the field measurement at the bottom of the cube's windward side. At the same time, the influence of the snow particle's threshold friction velocity on deposition/erosion is also analyzed in the paper.

     

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