| 沙粒在沙波纹表面上运动的大涡模拟 |
| |
| 引用本文： | 武生智,赵玉军.沙粒在沙波纹表面上运动的大涡模拟[J].甘肃科学学报,2010,22(3):1-4. |
| |
| 作者姓名： | 武生智 赵玉军 |
| |
| 作者单位： | 1. 兰州大学西部灾害与环境力学教育部重点实验室
2. ,兰州大学土木工程与力学学院,甘肃,兰州,730000 |
| |
| 基金项目： | 973计划项目"干旱区绿洲化、荒漠化过程对人类活动、气候变化的响应与调控--关键物理过程数值仿真"，国家自然科学基金项目"风沙湍流边界层及其地貌形态演化的理论与实验研究" |
| |
| 摘 要： | 为研究近地表面的风沙流在沙波纹风场中的运动状况,运用了大涡模拟方法和SIMPLER算法,根据近地边界层风场变化情况,在已有的风场中加入单一粒径沙粒,模拟了风沙流的运动,得出了沙粒在风场中不同时刻的堆积和运动状况,计算了沙粒的跃移长度和沙波纹几何尺度的关系,给出了沙粒和沙波纹之间的相互作用效果,真实的反映出了考虑沙波纹影响的风沙流运动情况.对进一步研究地貌形态的形成和发展有一定的工程实用意义和参考价值.
|
| 关 键 词： | 大涡模拟 风沙流 沙波纹 |
Large Eddy Simulation of Sand Movement over Surface of Sand Ripples |
| |
| WU Sheng-zhi,ZHAO Yu-jun.Large Eddy Simulation of Sand Movement over Surface of Sand Ripples[J].Journal of Gansu Sciences,2010,22(3):1-4. |
| |
| Authors: | WU Sheng-zhi ZHAO Yu-jun |
| |
| Institution: | WU Sheng-zhi,ZHAO Yu-jun(Key Laboratory of Mechanics on Western Disaster and Environment,College of Civil Engineering andMechanics,Lanzhou University,Lanzhou 730000,China) |
| |
| Abstract: | To study the wind-blown sand movement near the ground,a large eddy simulation method and SIMPLER algorithm were employed to calculate the air flow.First,the atmosphere turbulent boundary layer was calculated numerically.Then,the sand grains of the same diameter were added into the air flow,and their trajectories were simulated successfully.In the end,we obtained the relationship between the length of particle trajectory and the size of sand ripples.LES can be used to simulate the gas-particle flow and to st... |
| |
| Keywords: | large eddy simulation wind-blown sand flow sand ripples |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
