风沙运动的欧拉双流体模型参数研究

doi:10.7522/j.issn.1000-694X.2014.00010

摘要/Abstract

摘要：

利用数值方法研究了双流体模型中动力黏度μ_s,kin、动量交换系数β和碰撞恢复系数e_ss对风沙运动的影响.结果显示:动力黏度μ_s,kin影响沙床面起沙率,动量交换系数β影响输沙率沿流程的变化,碰撞恢复系数e_ss影响输沙量的垂向分布.利用研究得到的参数,模拟风沙流运动,并与已有的诸多实验和数值模拟结果对比,结果吻合较好,说明该参数的选取可以有效地模拟风沙流运动.

关键词: 欧拉双流体模型, 动力黏度, 动量交换系数, 碰撞恢复系数, 输沙率

Abstract:

Using the numerical simulation method, the effects of the kinetic viscosity μ_s,kin, the momentum exchange coefficient β and the particle restitution coefficient e_ss of Euler two-phase model on windblown sand movement are analyzed. The results demonstrate that the kinetic viscosity μ_s,kin affects the sand emission rate over sand bed, the momentum exchange coefficient β changes the development of streamwise sand transport rate, and the vertical distribution of sand mass flux varies with the particle restitution coefficient e_ss. The parameters obtained through numerical simulation are utilized to compute the windblown sand movement. And the characteristics of the windblown sand movement demonstrated by Euler two-phase model are in good accordance with those given in former experiments and numerical simulations. It shows that the parameters are suitable for the simulation of the windblown sand movement.

Key words: Euler two-phase model, kinetic viscosity, momentum exchange coefficient, particle restitution coefficient, streamwise sand transport

中图分类号:

O359
X169

王康龙, 武建军, 罗生虎. 风沙运动的欧拉双流体模型参数研究[J]. 中国沙漠, 2014, 34(6): 1461-1468.

Wang Kanglong, Wu Jianjun, Luo Shenghu. Investigation of Parameters in Euler Two-Phase Model for Wind Blow Sand[J]. JOURNAL OF DESERT RESEARCH, 2014, 34(6): 1461-1468.

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