Effectiveness of personalized air curtain in reducing exposure to airborne cough droplets

Xu, Jiujun; Guo, Hai; Zhang, Yanling; Lyu, Xiaopu

doi:10.1016/j.buildenv.2021.108586

Cited by 18 publications

(2 citation statements)

References 36 publications

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“…Meanwhile, there were two typical types of ventilation systems practised in hospital wards, namely mixing and displacement ventilation [70]. Later, a variety of ventilation forms including protective occupancy ventilation [71], personalized ventilation [72] and stratum ventilation [73] were proposed to improve the IAQ in hospital wards.…”

Section: Ventilation Strategies In Mitigating Airborne Infectionmentioning

confidence: 99%

Ventilation Strategies for Mitigating Airborne Infections in Healthcare Facilities: A Mini-Review and Bibliometric Analysis (1970 to 2021)

Saupi¹,

Kek²,

Tan³

et al. 2023

Preprint

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Over the years, researchers have been developing different ventilation strategies as a potential solution for controlling infectious airborne transmissions in healthcare facilities. The effects of ventilation systems on airflow characteristics have been extensively discussed among researchers since SARS-CoV-2 outbreak in 2019. Based on a bibliometric study of 154 publications from 1970 to 2021 retrieved from the Web of Science (WoS) database, this paper examines the research landscape on the effects of ventilation strategies on airflow analysis in healthcare facilities. Results show that China is the most productive country due to its significant contributions to the top prolific authors and funding agencies, which have promoted the research development of the topic. Several research hotspots were identified through keyword co-occurrence analysis. Cluster 1 highlights the ventilation studies involving ventilation layouts and ventilation rates in healthcare facilities. Cluster 2 underlines the computational analysis of ventilation performance for reducing the exposure risk of occupants, which promotes the development of infection control measures. Cluster 3 strengthens the knowledge of the emission and dispersion characteristics of respiratory droplets in healthcare facilities. Overall, this paper highlights the future direction of the current research field other than identifying strategic collaborators and suitable publication outlets for interested researchers.

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Section: Ventilation Strategies In Mitigating Airborne Infectionmentioning

confidence: 99%

Ventilation Strategies for Mitigating Airborne Infections in Healthcare Facilities: A Mini-Review and Bibliometric Analysis (1970 to 2021)

Saupi¹,

Kek²,

Tan³

et al. 2023

Preprint

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“…Recently the effectiveness of personalized air curtains has been considered for reducing the exposure to airborne cough droplets, in the context of COVID-19 (Sakharov and Zhukov 2020 ; Xu et al. 2022 ). In our applications, air curtains are used around abrasive rotative machines to limit the outside propagation of the emitted particles (Ikardouchene 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Interaction of a droplet spray with a turbulent plane air jet impacting a wall

2023

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Experiments are carried out to study the interaction of a spray of spherical micronic oil droplets with a turbulent plane air jet impacting a wall. The context is the separation of a contaminated atmosphere with passive particles from a clean atmosphere by using a dynamical air curtain. A spinning disk is used to produce the spray of oil droplets close to the air jet. The diameter of the produced droplets varies between 0.3 and m. The jet and particulate Reynolds numbers and the jet and Kolmogorov–Stokes numbers are, respectively, equal to Re , , and . The ratio of the jet height to nozzle width is . The flow properties in the experiments are measured by particle image velocimetry and are in good agreement with large eddy simulation results. The droplet/particle passing rate (PPR) through the air jet is measured by an optical particle counter. The PPR decreases with the increase in the droplet diameter for the studied droplet size range. Whatever the droplet size is, the PPR increases with time due to the presence of two large vortices on each side of the air jet that bring the droplets back to the jet. The accuracy and repeatability of the measurements are verified. The present results can be used to validate Eulerian/Lagrangian numerical simulations on the interaction of micronic droplets with a turbulent air jet.

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