| 沙源供给条件对风沙流结构的影响 |
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| 引用本文： | 任春勇,武生智.沙源供给条件对风沙流结构的影响[J].中国沙漠,2011,30(3):597-601. |
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| 作者姓名： | 任春勇 武生智 |
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| 作者单位： | 兰州大学西部灾害与环境力学教育部重点实验室/土木工程与力学学院,甘肃兰州,730000 |
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| 基金项目： | 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 |
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| 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。
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| 关 键 词： | 气固两相流 数值模拟 风速廓线 相体积分数 |
| 收稿时间： | 2010-12-1 |
| 修稿时间： | 2011-3-1 |
Effects of Sediment Supply on Aeolian Saltation Transport |
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| REN Chun-yong
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WU Sheng-zhi.Effects of Sediment Supply on Aeolian Saltation Transport[J].Journal of Desert Research,2011,30(3):597-601. |
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| Authors: | REN Chun-yong WU Sheng-zhi |
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| Institution: | REN Chun-yong,WU Sheng-zhi(Key Laboratory of the Ministry of Education for Mechanics on Disaster and Environment in Western China,School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China) |
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| Abstract: | 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 ch... |
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| Keywords: | gas-solid two phase flow numerical simulation velocity profile phase volume fraction |
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