市街地上空における気流性状の数値計算 : その１ 実際の市街地をケーススタディとした計算手法の検証

Abstract

Numerical simulations of the turbulent boundary layer over rough surfaces in the wind tunnel was performed using a refined k-ε turbulence model which can introduce the effect of roughness configuration and volume change of the roughness element. A series of calculations were done on the city models using the optimized drag coefficient and the length scale (termed roughness parameters in this study) for staggered arrayed cubic blocks. Simulated flows showed good agreement with experimental data. Finally, a three-dimensional simulation of wind flow over a real urban city where wind data were observed was carried out. The effectiveness of the simulation method was examined by comparing the calculated result with the field data.