Pant Chandra Shekhar, Kumar Sumit, Gavasane Abhimanyu
Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India.
Phys Fluids (1994). 2021 Nov;33(11):115129. doi: 10.1063/5.0073563. Epub 2021 Nov 19.
The primary objective of this work is to investigate the mixing of droplets/aerosols, which originates from the sneezing/coughing (of possibly COVID-19 patient) with the ambient atmosphere. Effectively, we are studying the growth/decay of droplets/aerosols in the presence of inhomogeneous mixing, which focuses on the phenomena of entrainment of the (relatively) dry ambient air. We have varied the initial standard deviation, mean radius of the droplets/aerosols size distribution, and humidity of the ambient atmosphere to understand their effects on the final size spectra of droplets. Furthermore, a rigorous error analysis is carried out to understand the relative importance of these effects on the final spectra of droplets/aerosols. We find that these are vital parameters to determine the final spectra of droplets, which govern the broadening of the size spectra. Typically, broadening the size spectra of droplets/aerosols increases the probability of the virus-laden droplets/aerosols and thus could affect the transmission of infection in the ambient atmosphere.
这项工作的主要目标是研究源自（可能是新冠病毒患者）打喷嚏/咳嗽产生的飞沫/气溶胶与周围大气的混合情况。实际上，我们正在研究在非均匀混合情况下飞沫/气溶胶的增长/衰减，重点关注（相对）干燥的周围空气的卷入现象。我们改变了初始标准差、飞沫/气溶胶尺寸分布的平均半径以及周围大气的湿度，以了解它们对飞沫最终尺寸谱的影响。此外，还进行了严格的误差分析，以了解这些影响对飞沫/气溶胶最终谱的相对重要性。我们发现这些是决定飞沫最终谱的关键参数，而飞沫最终谱决定了尺寸谱的展宽。通常，飞沫/气溶胶尺寸谱的展宽会增加携带病毒的飞沫/气溶胶的概率，从而可能影响周围大气中感染的传播。
