Effects of mask-wearing on the inhalability and deposition of airborne SARS-CoV-2 aerosols in human upper airway [0.03%]
佩戴口罩对吸入和沉积到人体上呼吸道的SARS-CoV-2气溶胶的影响
Jinxiang Xi,Xiuhua April Si,Ramaswamy Nagarajan
Jinxiang Xi
Even though face masks are well accepted as tools useful in reducing COVID-19 transmissions, their effectiveness in reducing viral loads in the respiratory tract is unclear. Wearing a mask will significantly alter the airflow and particle d...
Life of a droplet: Buoyant vortex dynamics drives the fate of micro-particle expiratory ejecta [0.03%]
微粒悬浮液滴的命运：浮力涡旋动力学作用下的液滴轨迹
E Renzi,A Clarke
E Renzi
We show that the dynamics of the expiratory cloud ejected during human respiratory events can be modeled by extending the theory of buoyant vortex rings with an initial momentum. We embed the integral conservation laws that govern the cloud...
Measurement of small droplet aerosol concentrations in public spaces using handheld particle counters [0.03%]
便携式颗粒物计数器在公共场所测量小液滴气溶胶浓度
G Aernout Somsen,Cees J M van Rijn,Stefan Kooij et al.
G Aernout Somsen et al.
We measure aerosol persistence to assess the risk of transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in public spaces. Direct measurement of aerosol concentrations, however, has proven to be technically difficul...
Effects of space sizes on the dispersion of cough-generated droplets from a walking person [0.03%]
空间尺度对行走人员咳嗽生成液滴扩散的影响
Zhaobin Li,Hongping Wang,Xinlei Zhang et al.
Zhaobin Li et al.
The dispersion of viral droplets plays a key role in the transmission of COVID-19. In this work, we analyze the dispersion of cough-generated droplets in the wake of a walking person for different space sizes. The air flow is simulated by s...
Su-Chen Wu,Meng-Yue Guo,Ji-Xiang Wang et al.
Su-Chen Wu et al.
How to prevent the flushing-induced plume without changing people's daily habits? Enlightened by thoughts of redesigning the restroom, this article provides a redesigned toilet using liquid-curtain-based strategy and verifies its advantages...
Analyzing the dominant SARS-CoV-2 transmission routes toward an ab initio disease spread model [0.03%]
基于从头算的疾病传播模型分析主导的SARS-CoV-2传播途径
Swetaprovo Chaudhuri,Saptarshi Basu,Abhishek Saha
Swetaprovo Chaudhuri
Identifying the relative importance of the different transmission routes of the SARS-CoV-2 virus is an urgent research priority. To that end, the different transmission routes and their role in determining the evolution of the Covid-19 pand...
Equilibrium and stability of axisymmetric drops on a conical substrate under gravity [0.03%]
重力作用下圆锥基底上轴对称液滴的平衡与稳定性
A K Nurse,S Colbert-Kelly,S R Coriell et al.
A K Nurse et al.
Motivated by recent investigations of toroidal tissue clusters that are observed to climb conical obstacles after self-assembly [Nurse et al., Journal of Applied Mechanics 79 (2012) 051013], we study a related problem of the determination o...
Rajneesh Bhardwaj,Amit Agrawal
Rajneesh Bhardwaj
Our previous study [R. Bhardwaj and A. Agrawal, "Likelihood of survival of coronavirus in a respiratory droplet deposited on a solid surface," Phys. Fluids 32, 061704 (2020)] showed that the drying time of typical respiratory droplets is on...
The perspective of fluid flow behavior of respiratory droplets and aerosols through the facemasks in context of SARS-CoV-2 [0.03%]
关于SARS-CoV-2的呼吸道飞沫和气溶胶通过口罩时流动行为的研究
Sanjay Kumar,Heow Pueh Lee
Sanjay Kumar
In the unfortunate event of the current ongoing pandemic COVID-19, where vaccination development is still in the trial phase, several preventive control measures such as social distancing, hand-hygiene, and personal protective equipment hav...
Experimental visualization of sneezing and efficacy of face masks and shields [0.03%]
打喷嚏的实验可视化及口罩和面罩的效果研究
Venugopal Arumuru,Jangyadatta Pasa,Sidhartha Sankar Samantaray
Venugopal Arumuru
In the present work, we propose and demonstrate a simple experimental visualization to simulate sneezing by maintaining dynamic similarity to actual sneezing. A pulsed jet with Reynolds number Re = 30 000 is created using compressed air and...