人体咳嗽飞沫传播DPM模拟与实验对比
Comparison between DPM simulation and experiment of human cough droplet transmission
摘要：
利用现有文献中的实验数据,对单个液滴自由落体运动过程的蒸发模型进行了验证。将离散相模型(DPM)加入蒸发模型,对人咳嗽喷出的飞沫液滴在室内随时间发展变化的特征和分布进行了模拟。模拟结果与现有不同相对湿度下的实验结果吻合得较好。在高相对湿度情况下,液滴蒸发较慢,有利于液滴的重力沉降,使得最后漂浮在空中的病毒飞沫含量更低,有助于防止病毒的传播。
Abstract：
The evaporation model of the free-fall motion of a single droplet is verified by using the experimental data in the existing literature. The discrete phase model (DPM) is added to the evaporation model to simulate the indoor transmission characteristics and distribution of droplets ejected by human cough with time. The simulation results are in good agreement with the existing experimental results under different relative humidities. In the case of high relative humidity, the droplet evaporates slowly, which is beneficial to the gravity settlement of the droplet, resulting in a lower content of the virus droplet floating in the air, which helps to prevent the virus transmission.
Keywords:droplet; virus transmission; cough; evaporation; discrete phase model (DPM)