摘要
It is very necessary for the investigation on mechanism of windblown sand movement to under- stand and find out effective measures of preventing and reducing danger of windblown sands,which al- so deals with some general characters and hot spots in the scientific forelands,such as multi-scale prob- lems,interactions among multi-physical-fields,ran- domness and nonlinearity as well as complex sys- tems.In recent years,a series of experiments in wind tunnels and theoretical modeling as well as computer simulation have been undertaken in the re- search group of environmental mechanics on wind- blown sand movement in Lanzhou University with the point of mechanical and geography intersecting view.Some original and essential progress has been achieved, which includes that the main regu- larities of charges on sand particles and the electric field in windblown sand flux and the effect of the electric field on the flux and the microwave propaga- tion are revealed,and the evolution process of windblown sand flux under the mutual couple inter- actions among several physical fields are predicted as well as the main features of Aeolian sand ripples are simulated.
It is very necessary for the investigation on mechanism of windblown sand movement to understand and find out effective measures of preventing and reducing danger of windblown sands,which also deals with some general characters and hot spots in the scientific forelands,such as multi-scale problems,interactions among multi-physical-fields,randomness and nonlinearity as well as complex systems.In recent years,a series of experiments in wind tunnels and theoretical modeling as well as computer simulation have been undertaken in the research group of environmental mechanics on windblown sand movement in Lanzhou University with the point of mechanical and geography intersecting view.Some original and essential progress has been achieved, which includes that the main regularities of charges on sand particles and the electric field in windblown sand flux and the effect of the electric field on the flux and the microwave propagation are revealed,and the evolution process of windblown sand flux under the mutual couple interactions among several physical fields are predicted as well as the main features of Aeolian sand ripples are simulated.
基金
the Key Project of the National Natural Science Foundation of China(No.10532040)
关键词
风沙运动
风沙流量
风沙电场
风化
windblown sand flux, windblown sand electric field, sand transport rate, Aeolian sand rippies, probability distribution of lift-off velocity
