| 沙漠地貌演化过程的湍流大涡模拟研究 |
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| 引用本文： | 吴锤结,陈剑.沙漠地貌演化过程的湍流大涡模拟研究[J].计算力学学报,2009,26(3):358-363. |
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| 作者姓名： | 吴锤结 陈剑 |
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| 作者单位： | 1. 大连理工大学,工业装备结构分析国家重点实验室,工程力学系,大连,116024
2. 解放军理工大学,理学院流体力学研究中心,南京,211101 |
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| 基金项目： | 国家自然科学基金重点项目 |
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| 摘 要： | 采用大涡模拟和混合粒径群体沙粒运动算法结合内置边界方法来模拟沙波纹与沙丘的演化和发展,在平坦沙区形成沙波纹的同时,在沙丘上同样也出现了沙波纹的结构,即沙波纹的发展出现了多尺度现象.此外,还分析了粒径对沙波纹与沙丘自身形态演化和发展的影响,以及沙丘对平坦沙区沙波纹形成发展的作用.
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| 关 键 词： | 沙波纹 沙丘 大涡模拟 混合粒径 内置边界 多尺度 |
| 收稿时间： | 2008/8/18 0:00:00 |
Large-eddy simulation of the evolution of land form of desert |
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| WU Chui-jie and CHEN Jian.Large-eddy simulation of the evolution of land form of desert[J].Chinese Journal of Computational Mechanics,2009,26(3):358-363. |
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| Authors: | WU Chui-jie and CHEN Jian |
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| Institution: | State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116024, China;Research Center for Fluid Dynamics, Science School, PLA University of Science and Technology, Nanjing 211102, China |
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| Abstract: | The methods of large-eddy simulation, the motion of sand particles with mixed sand sizes and immersed boundary are used to simulate the formation and evolution of sand ripples and sand dunes. When sand ripples appear in the flat ground, at the same time, they also shown up on the sand dunes, which means that the evolution of sand ripples has multiscale nature. Besides, the effects of sand sizes to the formation and evolution of sand ripples and sand dunes, and the effects of sand dunes to the formation and evolution of sand ripples on the flat ground, are analyzed. |
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| Keywords: | sand ripples sand dunes large-eddy simulation mixed sand sizes immersed boundary method multiscale |
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