| 风沙跃移运动发展过程的离散动力学模拟 |
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| 引用本文： | 李万清,周又和,郑晓静.风沙跃移运动发展过程的离散动力学模拟[J].中国沙漠,2006,26(1):47-053. |
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| 作者姓名： | 李万清 周又和 郑晓静 |
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| 作者单位： | 西部灾害与环境力学教育部重点实验室&兰州大学,力学系,甘肃,兰州,730000 |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家杰出青年科学基金 |
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| 摘 要： | 采用类似分子动力学的离散方法对二维风沙跃移过程运用高性能并行计算进行理论模拟。在本模拟模型中，考虑了沙粒与床面的碰撞、跃移沙粒与气流的相互作用等基本力学过程组成的复杂系统。通过并行运算技术使计算沙粒数达到72000的巨量计算得以实现。初步结果显示：自然跃移运动的基本特征如风沙流层内输沙率廓线可以较为成功的得以模拟。
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| 关 键 词： | 风沙跃移运动 沙波纹 碰撞 沙粒与气流耦合 沙粒散体 并行计算与模拟 |
| 文章编号： | 1000-694X（2006）01-0047-07 |
| 收稿时间： | 2004-06-20 |
| 修稿时间： | 2004-10-18 |
Discrete Dynamics Simulation on Developing Process of Aeolian Sand Saltation |
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| LI Wan-qing,ZHOU You-he,ZHENG Xiao-jing.Discrete Dynamics Simulation on Developing Process of Aeolian Sand Saltation[J].Journal of Desert Research,2006,26(1):47-053. |
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| Authors: | LI Wan-qing ZHOU You-he ZHENG Xiao-jing |
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| Institution: | The Key Laboratory of Western China Diaster and Environmental Mechanies &; Department of Mechanics of Lanhou University, Lanzhou 730000, China |
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| Abstract: | This paper used the analogous molecular dynamics to simulate the developing process of 2-D aeolian sand saltation through parallel computation.In this model,we consider that the complex system is composed of the base mechanics processes, such as grain-bed impacting and the coupling between saltating grains and wind flow,etc.By parallel computation,we realized to calculate large system which include 72 000 particles.The preliminary result have shown that this model can simulate the essential properties of natural sand saltation,such as the profile of mass flux is agreement with experimental result well. |
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| Keywords: | aeolian sand saltation sand ripples impact sand particles coupling with wind flow granular sand parallel computation and simulation |
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