STUDY OF ESTIMATION OF THERMAL AND TURBULENT FLOW FIELDS CONSIDERING METEOROLOGICAL DISTURBANCE IN URBAN AREA ON EXTREME HOT DAY

Recently, it is important to evaluate heat risk for the prevention of heatstroke in urban areas. In this study, we use the method for LES coupling with radiation and conduction model in Tokyo on extremely hot day in summer of 2018. The inflow turbulence was considered meteorological disturbances and atmospheric stability based on the WRF-LES result. The analysis results were compared with the observation data at Kitanomaru, the weather observatory, and confirmed the accuracy of the prediction. WBGT was more than 31℃ (“danger” rating) occurred intermittently in low-velocity areas, for examples, in the sunny and wake area of high-rise building.