LES Analysis on Wind in Suburban Area with Gently Sloped Terrain

Charactaristics of airflow inside and outside buildings

Abstract

Inside-and-outside airflow for buildings is complex a phenomenon complicated with turbulence behavior. Therefore a wind environment around a building is significant. Especially in Japan, there are many kinds of ups-and-downs. It is so important to consider both building arrays and ground undulation for assessment of airflow. But at present there are few studies to discuss these effects. In this research, we try to provide LES model for wind flow in actual suburban area by using the GIS data, which represent details of the ground surface consisting of houses and vegetation. So Yokohama area is treated as numerical example and LES computation is carried out by using nested grid. We clarify the characteristics of inside-and-outside airflow for building model located in actual urban area.