基于等高线的真实地形CFD建模方法

引入逆向工程建模思路,基于地形等高线,提出了一种真实地形CFD(Computational Fluid Dynamics)建模方法。通过对GIS地形数据的下载与处理,提取出研究区域等高线,进而利用等高线创建三角网格模型,结合逆向工程技术与三角网格模型生成地形网格模型。结果表明,该方法操作简便、生成模型精度高且建模效率高,有效地解决了使用常规建模方法存在的数据处理复杂、模型精度低以及不适用于大面积真实地形情况等问题,为真实地形的CFD数值模拟提供了支持。

A new modelling method of CFD real terrain based on contour lines

Based on reverse engineering technique and terrain contour lines, a new method of CFD (Computational Fluid Dynamics）terrain model generation is proposed. The contour lines information of study area was extracted by downloading and processing the shared geographic information system data and then the triangular mesh model could be created by using contour lines, finally, by combination with the reverse engineering technology and the triangular mesh model, terrain grids model can be generated. The experimental results show that the method is simple and the generated model has good accuracy with higher modeling efficiency, which can effectively solve the problems in conventional modeling methods, such as complex data processing, low model accuracy, and not suitable for large area of complex terrain, and provide a strong support for CFD numerical simulation of complex real terrain.