Open public spaces provide venues for cultural, recreational events and promote informal social contact between citizens. Successful outdoor spaces promote comfort and invite people to stay outdoors. Provision of ther...Open public spaces provide venues for cultural, recreational events and promote informal social contact between citizens. Successful outdoor spaces promote comfort and invite people to stay outdoors. Provision of thermal comfort outdoors present a challenge, as an extended range of environmental conditions must be dealt with. The present study examines whether climatic characteristics in Dublin facilitate exercising tong-term outdoor activities during summer, and investigates the extent to which urban planning and the resulting urban morphology of the built environment influences microclimates created, from the viewpoint of wind environment. Microclimates at Grand Canal Square have been simulated by ENVI-met. Wind velocity has been expressed in relation to that of the ＂background＂ climate in order to verify if the site has a wind protecting character or to the contrary, it enhances airflow. The results show for the dominant wind directions （W, SW, S） that 60% higher wind velocity than at Dublin Airport can occur around building corners and at restricted flow sections--preventing any kind of long-term outdoor activity during a ＂typical＂ day. S and SW winds cause 15%-20% acceleration at the W waterfront area. Windy urban environment can call forth a limited frequentation of urban space.展开更多
文摘Open public spaces provide venues for cultural, recreational events and promote informal social contact between citizens. Successful outdoor spaces promote comfort and invite people to stay outdoors. Provision of thermal comfort outdoors present a challenge, as an extended range of environmental conditions must be dealt with. The present study examines whether climatic characteristics in Dublin facilitate exercising tong-term outdoor activities during summer, and investigates the extent to which urban planning and the resulting urban morphology of the built environment influences microclimates created, from the viewpoint of wind environment. Microclimates at Grand Canal Square have been simulated by ENVI-met. Wind velocity has been expressed in relation to that of the ＂background＂ climate in order to verify if the site has a wind protecting character or to the contrary, it enhances airflow. The results show for the dominant wind directions （W, SW, S） that 60% higher wind velocity than at Dublin Airport can occur around building corners and at restricted flow sections--preventing any kind of long-term outdoor activity during a ＂typical＂ day. S and SW winds cause 15%-20% acceleration at the W waterfront area. Windy urban environment can call forth a limited frequentation of urban space.
