摘要
针对风沙运动的气固两相流特点,利用FLUNET软件,对不同沙源供给条件下各种床面的风沙积蚀平衡进行了数值模拟,给出了风速分布和沙粒体积分数随沙源供给条件和下垫面变化的线图,比较了流动边界条件对流场的影响。计算结果揭示了风沙运动中沙粒的体积浓度分布在风速变化和床面形态变化下的变化规律,为沙漠化的防治和理论研究提供了基础。
This paper presented two-dimensional numerical simulation of sand transport by wind, in which the software FLUNET was employed according to the feature of sand-laden wind structure that is a kind of two phase flow. Sand erosion-deposit budget over different sand beds were analyzed. The velocity distribution of air and volume fraction distribution of sand grain were obtained for various sand supplies and different surface roughness. The simulating results disclosed the sand volume fraction distribution law in changing wind velocity and sand bedforms, and can provide groundwork for further theoretical study and desertification control.
出处
《中国沙漠》
CSCD
北大核心
2011年第3期597-601,共5页
Journal of Desert Research
基金
国家重点基础研究发展规划项目(2009CB421304)
国家自然科学基金项目(10672071
11072098)共同资助
关键词
气固两相流
数值模拟
风速廓线
相体积分数
gas-solid two phase flow
numerical simulation
velocity profile
phase volume fraction
