风沙流中颗粒速度分布的格子Boltzmann模拟及风沙冲蚀研究

	风沙流中颗粒速度分布的格子Boltzmann模拟及风沙冲蚀研究
Alternative Title	Lattice Boltzmann Simulation of Velocity Profiles of Saltating Sand particles and Numerical prediction on Erosion Damage Caused by It
	石晓飞
Subtype	硕士
Thesis Advisor	武建军
	2012-05-24
Degree Grantor	兰州大学
Place of Conferral	兰州
Degree Name	硕士
Keyword	风沙流格子Boltzmann方法颗粒速度分布冲蚀磨损
Abstract	沙粒在风的作用下从起跳、输运到沉积是一种十分常见并且重要的物理过程。当大量沙粒的运动便形成了风沙流。很多严重的环境问题都与其相关，例如农业土地退化、空气质量下降等。沙粒速度研究是风沙问题的一个重要方面。沙粒速度决定了风沙流能量、输沙量、输沙率等较多衡量风沙流强度的重要指标。由于近地表风沙流中沙粒数量多、速度快，往往会对地表设施产生较为严重的冲蚀破坏。因此，对于风沙流中颗粒速度以及其冲蚀能力的研究十分必要。
Other Abstract	The motions of sand particles driven by wind are very important physical processes, which include ejection, saltation, and sedimentation. The wind-sand flow develops when the number of moving particles becomes large. The wind-sand flow can result in several serious environmental problems, such as the land degradation, decline of the air quality and so on. Researches on the velocity of sand particles have drawn much attention, as the velocity of sand is crucial to the energy flux and mass flux of the wind-sand flow, which are indexes of the intension of flow. The structures and equipments near surface suffer serious erosion damage caused by blown sand, particularly when the particle number is large and velocity is big. Consequently, study about the velocity and the erosive ability of sand particles are quite essential.
URL	查看原文
Language	中文
Document Type	学位论文
Identifier	https://ir.lzu.edu.cn/handle/262010/226516
Collection	土木工程与力学学院
Recommended Citation GB/T 7714	石晓飞. 风沙流中颗粒速度分布的格子Boltzmann模拟及风沙冲蚀研究[D]. 兰州. 兰州大学,2012.

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