沙粒跃移模型及其数值分析

计算物理 ›› 1985, Vol. 2 ›› Issue (4): 443-453.

沙粒跃移模型及其数值分析

刘绍中¹, 杨绍华¹, 凌裕泉²

1. 中国科学院成都计算机应用研究所;
2. 中国科学院兰州沙漠研究所

收稿日期:1984-12-12 出版日期:1985-12-25 发布日期:1985-12-25

SALTATION MODEL OF SAND AND ITS NUMERICAL ANALYSIS

Liu shao-zhong¹, Yang shao-hua¹, Ling Yu-quan²

1. Chengdu Institute of Computer Application, Academia sinica;
2. Lanzhou Institute of Desert Research, Academia sinica

Received:1984-12-12 Online:1985-12-25 Published:1985-12-25

摘要/Abstract

摘要： 本文计算了近地面湍流边界层的速度分布。根据跃移运动的临界摩擦速度及湍流边界层的计算,给出了产生跃移运动的边界层范围,假定运动沙粒与静止沙粒的接触点上没有相互滑移运动,提出了旋转力矩是在跃移运动初始阶段由升力和粒子间相互作用力产生的,并计算了该力矩作用时间和大小。计算了跃移轨迹,得到了跃移的诸运动要素。与实验结果比较,在所考虑范围内,其结果是一致的。

Abstract: The Velocity distribution of the atmospheric turbulence boundary layer of the Earth Was calculated. Based on the calculation of the threshold friction speed of saltation and the turbulence boundary-xayer, the extent of the boundary layer where saltation may occure was obtained. The rotation moment of force which plays an important role in the movement of sand consists of lift and interparticle force in the early stage of saltation.The duration and the strength of the moment of force were calculated.The trajectory and the movement parameters of saltation were obtained. All results of calculation tully with the experiment results.

刘绍中, 杨绍华, 凌裕泉. 沙粒跃移模型及其数值分析[J]. 计算物理, 1985, 2(4): 443-453.

Liu shao-zhong, Yang shao-hua, Ling Yu-quan. SALTATION MODEL OF SAND AND ITS NUMERICAL ANALYSIS[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 1985, 2(4): 443-453.