Automatic Conversion of Visually Consistent Digital Maps to Conforming Geometry for Computational Fluid Dynamics
Automatic Conversion of Visually Consistent Digital Maps to Conforming Geometry for Computational Fluid Dynamics
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DOI：
10.1061/(asce)cp.1943-5487.0000473
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Takahiro Kawaguchi;K. Oguni
中科院分区：
文献类型：
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作者：
Takahiro Kawaguchi;K. Oguni
摘要本文提出了一种用于城市尺度计算流体动力学（CFD）的三维数字地图自动转换成符合几何图形的方法。将视觉上一致的三维数字地图自动转换为城市尺度CFD的有限元网格存在以下困难：(1)建筑物的拓扑信息不一致；(2)建筑物与地面的层数独立且不一致；(3)建筑物表面存在不必要且自发的小间隙。本文提出的自动转换方法结合传统的计算几何算法，解决了这些问题。本文的主要贡献不在于提出了新的计算几何算法，而在于：(1)明确了三维数字地图可视化自动转换到城市尺度CFD分析领域的问题；(2)提出了解决方案。
AbstractA method for automatic conversion of three-dimensional (3D) digital maps for visual purposes to a conforming geometry for city-scale computational fluid dynamics (CFD) is proposed in this paper. Difficulties in automatic conversion of visually consistent 3D digital maps to a finite-element mesh for city-scale CFD are as follows: (1) representation of the buildings without consistent topological information, (2) independent and inconsistent layers for buildings and the ground surface, and (3) existence of unnecessary and spontaneous minor gaps on the building surface. The proposed automatic conversion method resolves all these problems by a combination of conventional algorithms for computational geometry. The major contribution of this paper is not a proposal of new algorithms in computational geometry but includes the following: (1) clear definition of the problems in automatic conversion of 3D digital maps for visual purposes to the analysis domain for city-scale CFD, and (2) proposal of a solut...