LES for urban boundary layer using inflow condition including weather disturbance

Abstract

This study carifies the effect of weather disturbance on the turubulent field of urban boundary layer by LES. First, the inflow condition assuming atmospheric boundary layer is generated by WRF-LES and spatial filtering and rescaling method and the inflow data is connected to calculation domain for BCM-LES. As a result of comparison between cases using inflow condition with and without weather disturbance, it is confirmed that wind velocity fluctuation derived from weather disturbance appears in the upper part of urban boundary layer and it affects the turbulence field above the urban roughness.