Abstract
Inhabitants and pedestrians in an urban area are subjected to the air flow condition within it. The complexity of the buildings geometry and density of its arrangement may lead to the gusty environment. In order to understand the situation, a large eddy simulation (LES) over a huge and high resolution of an urban area was carried out. The Lattice Boltzmann method (LBM) applied in this LES for several advantages. The computational domain size is 19.2 km in streamwise by 4.8 km in spanwise and 1 km in the vertical while the grid resolution is 2 m. The maximum wind speed normalized to several representative wind speeds considered to gain the appropriate spatial gust factor definition. This non-dimensional factor calculated and its location of occurrence was mapped. Some events were highlighted to study the correlation between the high gust factor and the building geometry.
