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工程力学  2015 

拉格朗日方法在风雪运动模拟中的应用

DOI: 10.6052/j.issn.1000-4750.2013.07.0607, PP. 36-42

Keywords: 拉格朗日方法,数值模拟,风雪运动,摩擦速度,质量传输率

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Abstract:

采用拉格朗日方法,模拟空旷场地中雪颗粒从开始运动至整个流域达到平衡状态的过程。分析了雪颗粒的运动特性,结合文献中的击溅函数,追踪每个跃移雪颗粒的运动状态,同时考虑了跃移雪颗粒对风场的修正作用。考察了在风雪流发展过程中跃移雪颗粒的数目、质量传输率和摩擦速度的变化规律,以及流域达到平衡状态后跃移雪颗粒质量通量沿高度的分布。同时将数值模拟结果与文献中的实测结果进行了详细的对比,两者吻合较好。

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