| 摘要: |
| 随着计算流体力学(CFD)的应用领域逐步涉及到真实地形模拟,系统探讨如何生成及优化真实地形CFD网格也显现出重要意义。结合算例研究,提出一种通过获取及处理GIS数据,绘制点线面体等步骤生成真实地形网格的方法；强调对于所生成的网格,需采用网格依赖分析方法对比其计算精确性与经济性以实现优化选择；提出通过CFD前处理器二次开发形成真实地形CFD网格绘制软件以提高网格生成效率的建议。结果表明,所提方法生成的CFD网格与实际地形吻合程度高,可为真实地形CFD精细模拟应用提供可靠基础。 |
| 关键词: 真实地形 计算流体力学网格 网格依赖 |
| DOI：10.3969/j.issn.1673-5005.2011.05.019 |
| 分类号::O 351.3 |
| 文献标识码:A |
| 基金项目:中央高校基本科研业务费专项资金项目(10CX01001A);国家科技重大专项“大型油气田及煤层气开发”课题(2008ZX05017) |
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| A method for computational fluid dynamics grids formation on complex terrain |
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ZHANG Bo1,2, CHEN Guo ming1,2, KONG Ling zhen3
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(1.Center for Offshore Engineering and Safety Technology in China University of Petroleum, Qingdao 266555, China;2.College of Mechanical and Electronic Engineering in China University of Petroleum,Qingdao 266555,China;3.College of Mechanical and Transportation Engineering in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| As the applications of computational fluid dynamics(CFD) extend to the area of complex terrain simulations, it is important to systematically develop methods for CFD grids generation and optimization of complex terrains. Through a specific case study, a grid generation approach which contained steps of data acquisition, processing and conversion, construction of vertex, lines, faces and volumes,was presented. It was also stressed that the grid dependency study was important for choosing appropriate grids considering both the computation accuracy and costs. A suggestion of developing a software for complex terrain grids generation by redevelopment of current CFD preprocessors was also presented, which hopefully could enhance the grid generation efficiency significantly. The results show that the grid generated by this method agrees well with the complex terrain, and it could provide a solid foundation for CFD application in complex terrain simulations. |
| Key words: complex terrain computational fluid dynamics grids grid dependency |
