Mathematical modeling of snow entrainment in avalanche motion
Mathematical modeling of snow entrainment in avalanche motion
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DOI：
10.1016/j.coldregions.2005.03.005
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发表时间：
2005-11
影响因子：
4.1
通讯作者：
M. Eglit;K. S. Demidov
中科院分区：
文献类型：
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作者：
M. Eglit;K. S. Demidov
雪的卷吸作用在雪崩动力学中起着重要的作用。本文讨论了将卷吸效应纳入雪崩数学模型的各种方法。计算结果使用各种公式的卷吸率，已提出的床面侵蚀的各种物理性质的流动。对于各种研究夹带法律发现，在运动中在一个陡峭的斜坡夹带发生在一个正面的雪崩。雪崩的运动主要取决于可融化雪层的总深度和卷吸带的长度，而对卷吸定律的形式的影响很小。然而，卷吸区的长度取决于进入卷吸定律的系数的值。
The entrainment of snow plays an important role in snow avalanche dynamics. Various ways of incorporating the entrainment effect into avalanche mathematical models are discussed in this paper. The results of calculations using a variety of formulae for the entrainment rate that have been proposed for bed erosion by flows of various physical natures are presented. For various studied entrainment laws it is found that in motion at a steep slope the entrainment takes place in a frontal part of an avalanche. The motion of an avalanche depends mainly on the total depth of the entrainable snow layer and on the length of the entrainment zone, but only weakly on the form of the entrainment law. However the length of an entrainment zone depends on the values of the coefficients entering the entrainment law.