CFD simulation and Characterization of Coughs and sneezes: Airborne droplet transmission to humans during COVID 19

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI:10.1615/tfec2022.bio.041184

Nazia Afrin, Kenneth Gilley

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Abstract

Covid-19 spread mainly from person to person, specially through respiratory droplets produced when an infected person coughs and sneezes. Those droplets can drop/land in the surroundings people who are nearby or possibly be inhaled into the lungs. It has been confirmed that the droplets come out from an infected person coughs and sneeze. The possibility of spread can travel 6 feet (1.83 meter) based on the assumption that the no air circulation exists around people. A validated computational fluid dynamics (CFD) model is employed to investigate the transient transport and deposition of droplets emitted by infected people's sneezes and coughs with different atmosphere with distinguished wind velocities and RH. The computational simulation is able to perform the effect of wind speed and relative humidity on the social distancing to prevent Covid-19 airborne transmission. It is shown from the result that the droplet transmission leading to virus concentrations in the air is sufficient to transmit the infections to the people more than 6 feet away. © 2022 Begell House Inc.. All rights reserved.

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咳嗽和打喷嚏的CFD模拟和特征:COVID - 19期间空气飞沫传播给人类

Covid-19主要在人与人之间传播，特别是通过感染者咳嗽和打喷嚏时产生的呼吸道飞沫传播。这些飞沫可能落在周围的人身上，也可能被吸入肺部。经证实，这种飞沫是由感染者咳嗽和打喷嚏产生的。假设周围没有空气流通，传播的可能性可以达到6英尺(1.83米)。采用经过验证的计算流体动力学(CFD)模型，研究了不同大气条件下不同风速和相对湿度下感染人群打喷嚏和咳嗽时飞沫的瞬态传输和沉积。计算模拟能够模拟风速和相对湿度对防止Covid-19空气传播的社会距离的影响。结果表明，由飞沫传播导致的病毒在空气中的浓度足以将感染传播给6英尺以外的人。©2022 Begell House Inc..版权所有。

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Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC)

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