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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Pollutant dispersion diagnosis over complex surfaces of variable land use using unstructured prismatic grid
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Pollutant dispersion diagnosis over complex surfaces of variable land use using unstructured prismatic grid

机译：使用非结构化棱柱网格诊断可变土地利用复杂表面上的污染物扩散

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摘要

The advantageous utilization of triangular prismatic grid for flow simulation over irregular geometries is widely recognized. Such grid is here utilized to diagnose the atmospheric conditions and pollutant dispersion over complex inhomogeneous surfaces. One case with an extremely complex surface is resolved with regular prismatic grid. A second case, including parts of flat and mountainous areas, is resolved with completely unstructured grid. The atmospheric calculations rely on field data. The detailed surface description achieved through the triangular mesh allows facing lack of observations at significant sites, while it permits the selective use of the measurements for the determination of the local atmospheric conditions. The simulations are compared against observed pollutant concentrations. A quite satisfactory agreement is obtained, indicating that diagnostic models using improved surface resolution can provide reasonable results over complex terrain. This is considered very important since the use of diagnostic models is strongly suggested in emergency response cases.
机译：三角形棱柱网格在不规则几何形状上进行流动模拟的有利用途已广为人知。这种格栅在这里用于诊断大气条件和污染物在复杂非均匀表面上的扩散。使用规则的棱形网格可以解决一种表面极为复杂的情况。第二种情况，包括平坦和山区的一部分，通过完全非结构化的网格得以解决。大气计算依赖于现场数据。通过三角形网格实现的详细表面描述允许在重要站点上缺乏观测，同时允许有选择地使用测量值来确定局部大气条件。将模拟与观察到的污染物浓度进行比较。获得了相当令人满意的协议，表明使用改进的表面分辨率的诊断模型可以在复杂的地形上提供合理的结果。这被认为非常重要，因为强烈建议在紧急情况下使用诊断模型。

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