Spatial Distribution of Exhalation Droplets in the Bus in Different Seasons

In closed buses, the spread of droplets with viruses/bacteria may cause respiratory infectious diseases. Discrete phase modeling is used to simulate diffusion characteristics and concentration distribution at different temperatures exhalation positions by ANSYS FLUENT software. The integral locations can be quantified, which leads identification low-risk areas high-risk in bus. Results show that a higher outdoor temperature lower droplets’ speed longer time until reach driver. addition, based on seats, regardless whether passenger exhales front row bus, position rear door or last seats bus away from belong area. contrast, near middle seat are risk areas. Consequently, this study proposed sitting area as means reduce passengers. Moreover, safety protection facilities around driver should modified improve isolation upper driver’s location, so effectively prevent droplet towards driver, thereby reducing infection.