A source term model for drifting snow based on the assumption of local equilibrium saltation

A source term model for drifting snow based on the assumption of local equilibrium saltation
复制标题

基于局部平衡跃移假设的流雪源项模型

DOI:
10.1016/j.coldregions.2020.103175
复制
发表时间:
2021
影响因子:
4.1
通讯作者:
Shu Liu
Shu Liu
中科院分区:
工程技术3区
文献类型:
--
作者:
Duote Liu;Bin Wang;Yongle Li;Shu Liu

文献摘要

参考文献

相似文献

本文基于局部平衡跃变的假设,提出了一种预报近地面积雪的源项模型。利用数值实验方法对输入雪源与输出雪浓度进行了标定,检验了单向耦合守恒方程在欧拉坐标系中雪输送的特征。利用平衡跃变的半经验质量流量和不同摩擦速度、门槛摩擦速度和沉降速度下的定标结果,导出了地表侵蚀引起的雪浓度补偿的目标源项。通过对开阔平坦雪床上方的平衡跃迁进行验证,解决了合理的跃迁质量浓度问题。利用该源项模式,证实了该模式对各种风雪条件具有良好的适应性。将其应用于立方体周围的非平衡跃变,通过时间相关的动态网格解,直观地预报了近地面积雪浓度的分布和雪面的瞬时地形变化。摩擦速度和跳跃积雪浓度的空间分布和时间历程进一步证明了漂雪在时间和空间上的非平衡性。
This paper presents a source term model to predict the drifting snow near the ground, which is based on the assumption of local equilibrium saltation. The features of the one way coupled conservation equation for the snow transport in the Eulerian reference frame are examined through calibrating the input sources versus output snow concentrations by using a numerical experiment method. The target source term for the snow concentration compensation due to the surface erosion is derived with the help of a semi-empirical mass flow rate of the equilibrium saltation and the calibration results under different friction velocities, threshold friction velocities and settling velocities. With the validation on the equilibrium saltation above an open and flat snow bed, rational saltation mass concentration is solved. Using this source term model, good adaptabilities for various wind and snow conditions are confirmed. With the application to the non-equilibrium saltation around a cube, intuitively plausible distributions of the snow concentration near the ground and the transient topography changes in the snow surface are predicted through a time dependent dynamic mesh solution. The non-equilibrium properties of the drifting snow revealed in space and time are further evidenced by the spatial distributions and time histories of the friction velocity and the saltation snow concentration
DOI: 10.1023/a:1002643921326
发表时间: 2000-06
影响因子: 4.3
作者:
R. Bintanja
通讯作者: R. Bintanja
DOI: 10.2307/633037
发表时间: 1985
期刊: --
影响因子: --
作者:
R. Greeley;J. Iversen
通讯作者: R. Greeley;J. Iversen
DOI: 10.1016/0167-6105(90)90082-n
发表时间: 1990
影响因子: 4.8
作者:
R. Kind
通讯作者: R. Kind
DOI: 10.3189/1998aog26-1-191-196
发表时间: 1998
影响因子: 2.9
作者:
M. Naaim;F. Naaim-Bouvet;H. Martínez
通讯作者: M. Naaim;F. Naaim-Bouvet;H. Martínez
DOI: 10.1016/0167-6105(93)90344-n
发表时间: 1991-11
影响因子: 4.8
作者:
T. Sato;T. Uematsu;T. Nakata;Y. Kaneda
通讯作者: T. Sato;T. Uematsu;T. Nakata;Y. Kaneda