论文标题
全面分析通风和气候条件对通过呼吸液滴传输通过升降机内的空气传播和富米特模式通过呼吸液滴传输的影响
A comprehensive analysis of the effect of ventilation and climatic conditions on covid-19 transmission through respiratory droplet transport via both airborne and fomite mode inside an elevator
论文作者
论文摘要
在电梯（例如电梯）中，由于这些液滴引起的疾病传播的风险显着很高。在这项工作中，已经进行了使用OpenFOAM的数值分析，以研究类似于电梯的封闭环境中的液滴色散路线。两种情况对液滴分散的影响，即静止和风扇驱动的通风，均受各种气候条件（温度和湿度）的各种气候条件，范围从冷潮湿（15度C，70％相对湿度）到热干燥到热干燥（30度C，30％C，30％相对湿度，30％C，30％相对湿度），相对湿度（30％C相对稳定），相对稳定（30％），相对稳定（30％），相对稳定，70％，70％，70％，70％，70级，70级。基于乘客口周围存在的时间平均病原体数量的剂量响应模型得出的危险因素用于量化通过空中模式的感染风险。发现炎热，干燥的静止场景构成了最大的感染威胁（空间平均风险因素为42％），而冷潮湿状况则构成最小的感染风险（时空平均风险因素30％。在低RPM处的实施型号与Quiescent Speed相比，风险降低了。与静止的情况相比，在炎热的，干燥的气候条件下，RPM（平均风险因素平均10％）在炎热的，干燥的气候条件下将感染的风险降低了67％。由于在呼吸区域的各个深度对感染产生的影响，因此进行了彻底的分析。
The risks of disease transmission due to these droplets are significantly high in confined public spaces like elevators. A numerical analysis using OpenFOAM has been performed in this work to investigate the droplet dispersion routes in an enclosed environment resembling an elevator. The effect of two scenarios on droplet dispersal, namely the quiescent and the fan-driven ventilation, both subjected to various climatic conditions (of temperature and humidity) ranging from cold humid (15 degree C, 70 percent relative humidity) to hot dry (30 degree C, 30 percent relative humidity and 30 degree C, 50 percent relative humidity) and hot humid (30 degree C, 70 percent relative humidity) have been studied. A risk factor derived from a dose response model based on the time averaged pathogen quantity present around the passengers mouth is used to quantify the risk of infection through airborne mode. It is found that the hot, dry quiescent scenario poses the greatest threat of infection (spatio averaged risk factor 42 percent), whereas the cold humid condition poses the least risk of infection (spatio averaged risk factor 30 percent. The implementation of Fan ventilation at low RPM increases the risk as compared to a quiescent scenario, however with the increase in speed the risk decreases significantly. The Fan ventilation scenario with 1100 RPM (having a spatio averaged risk factor of 10 percent) decreases the risk of infection by 67 percent in a hot, dry climatic condition as compared to a quiescent scenario. However, there is no significant reduction in risk beyond a certain Fan speed, 1100 RPM. The deposition potential of aerosolized droplets in various parts of the respiratory tract namely the Extrathoracic and the Alveolar and Bronchial regions has been analyzed thoroughly because of the concomitant repercussions of infection in various depths of the respiratory region.
