摘要
风沙运动机理研究是认识风沙灾害本质进而实现有效防治的基础,所涉及的诸如多尺度、多场耦合、随机性、非线性、尺度效应和复杂系统等科学问题也是科学前沿所关注的共性和热点课题。近：年来兰州大学风沙环境力学研究组从力学和地学的学科交叉角度,通过风洞实验、理论建模和计算机模拟研究,揭示了风沙流中沙粒带电量和风沙电场的基本规律及其对风沙流和无线电通讯的影响,实现了对考虑多物理场耦合作用的风沙流发展过程的理论预测以及对风成沙波纹主要特征的计算机模拟,取得一些具有原创性的实质进展。
It is very necessary for investigation on mechanism of windblown sand movement to understand and find out effective measures of preventing and reducing windblown sands endanger, 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 taken 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 progresses have been achieved, which included 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.
出处
《中国科学基金》
CSCD
北大核心
2006年第5期285-287,292,共4页
Bulletin of National Natural Science Foundation of China
关键词
风沙流
风沙电场
输沙率
沙波纹
起跳初速度分布
windblown sand flux, windblown sand electric field, sand transport rate, Aeolian sand ripples,probability distribution of lift-off velocity
