摘要
对于不同的沙粒起跳初速度分布函数 ,利用数值方法模拟了沙粒浓度沿高程的分布规律 ,发现风沙流强度沿高程具有“递增 -饱和 -衰减”的按层分布的规律 .进一步详细研究了影响风沙流结构的主要因素 ,如风速分布、地表粗糙度、沙粒粒径等对风沙流结构的影响方式和规律 .
The profiles of particle concentration in saltation layer with height are calculated by incorporating the realistic probability distribution function of vertical liftoff velocities of grains. The numerical results demonstrated the stratification feature of the profile of particle concentration and respectively showed increasing,saturating and decreasing features. In addition,the effects of such factors as the friction velocity,the roughness height and the magnitude of grain and their regularities are studied in detail on the structure of windblown sand flow.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第3期15-21,共7页
Journal of Lanzhou University(Natural Sciences)
基金
国家重点基础研究发展规划项目 (G2 0 0 0 0 4 870 2 )
教育部科技重点项目资助
