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Recently, vertical ventilation paths are receiving considerable attention as promising countermeasures to hot environment in summer. Vertical ventilation paths channel cooler upper winds into city blocks by using vertical turbulent diffusion enhanced by the vertical heterogeneity of building shapes. However, their effectiveness is limited because the temperature of the flow gradually becomes higher and the momentum of the flow for vertical ventilation paths gradually decreases. In this study, we investigated the effects of introducing vertical ventilation paths in city blocks by using CFD simulations. We examined the effects of the vertical heterogeneity of building shapes in the windward region on the thermal and wind environments in both the windward and leeward regions based on a heat balance analysis, space-averaged temperatures, and a proposed evaluation method using the turbulent kinetic energy profile.

nihon kenchiku gakkai kankyokei ronbunshu/nihon kenchiku gakkai kankyoukei rombunshuu

ASSESSMENT OF THE EFFECTS OF INTRODUCING VERTICAL VENTILATION PATHS ON THERMAL AND WIND ENVIRONMENTS IN THE WINDWARD AND LEEWARD REGIONS OF CITY BLOCKS