ショートプレゼン2

[P02-13] Effects of Urban Canopy on Turbulence Heat-Transfer Process in Convective Boundary Layer

*Yasuo HATTORI¹, Shuji ISHIHARA², Hitoshi SUTO¹, Keisuke NAKAO¹, Yuma HASEBE², Hiromaru HIRAKUCHI¹ (1. Central Research Institute of Electric Power Industry, 2. Denryoku Computing Center)

Keywords:Turbulence, Large eddy simulation, Buoyant flow

Large-eddy simulations (LES's) for a thermally convective flow above buildings and streets (an urban canopy) in the atmospheric boundary layer are performed. Special attention is paid to the effects of the buildings on turbulence heat transfer processes in the vertical direction of the atmospheric boundary layer. LES's clearly show that the buildings yield the dissimilarity between thermal and flow fields, i.e., the vertical profiles of turbulence statistics and also coherence structures in the thermal fields significantly differ from those in the flow fields.