Future Elevated City: Simulation of Vehicle Exhaust Diversion by Wall-Mounted Air Duct in Traffic Space

Currently, urban traffic poses numerous inconveniences to human beings, including vehicle emissions, traffic congestion and accidents. These issues seriously jeopardize people's health and safety. Therefore, the future development direction of cities revolves around promoting urban decoupling and reshaping the urban framework. One author has proposed a futuristic urban model consisting of three layers of spatial structure. This model enables the separation of pedestrians and vehicles, ensuring pedestrian safety while alleviating traffic congestion. In this research paper, the traffic space incorporates a design featuring wall-mounted air ducts. These air ducts effectively extract and collect vehicle exhaust from underneath the traffic space. Through forced convection, the exhaust is then discharged, avoiding any adverse impact on the surrounding environment. To evaluate the efficacy of this design, 3D models of modern and future urban traffic spaces are created. The study investigates the influence of various factors such as vehicle exhaust emissions (number of cars), environmental wind speeds, air distribution modes and duct layouts on the temperature field and exhaust distribution within traffic spaces. By comparing the results obtained from the two urban models, it is determined that the utilization of wall-mounted ventilation ducts effectively removes vehicle exhaust from the traffic space, preventing its negative effects on the surrounding area.