论文标题
动荡的喷气机如何将病毒云分散在通风不良的空间中
How Turbulent Jets Can Disperse Virus Clouds in Poorly Ventilated Spaces
论文作者
论文摘要
我们表明，增强的湍流混合可用于通过将含有病毒的云分散在封闭的通风空间中，来减轻空气传播的Covid-19传播。与房间通风时间相比，设计了一个简单的风扇驱动湍流喷气机系统，以使时间尺度上的被动污染物的峰值浓度最小化。使用标准雷诺平均和相似性方法，并考虑了圆形和径向壁架的组合。计算湍流扩散率和污染物混合时间。结果表明，这种方法可以显着降低峰值病毒云浓度，尤其是在占用率较低的小空间中，例如洗手间。当然，在没有通风的情况下，湍流混合无效。
We show that enhanced turbulent mixing can be used to mitigate airborne COVID-19 transmission by dispersing virus-laden clouds in enclosed, poorly ventilated spaces. A simple system of fan-driven turbulent jets is designed so as to minimize peak concentrations of passive contaminants on time scales short compared to the room ventilation time. Standard Reynolds-average and similarity methods are used, and combinations of circular and radial wall jets are considered. The turbulent diffusivity and contaminant mixing time are calculated. Results indicate that this approach can significantly reduce peak virus cloud concentrations, especially in small spaces with low occupancy, such as restrooms. Turbulent mixing is, of course, ineffective in the absence of ventilation.
