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. 2019 Jul;29(4):591-603.
doi: 10.1111/ina.12563. Epub 2019 May 23.

Direct or implicit exposure of exhalation contaminants in piled environments using an integral model of an expiratory jet

Fan Liu  1 , Chongyang Zhang  1   2 , Hua Qian  1 , Xiaohong Zheng  1 , Peter V Nielsens  3
Affiliations

Sofort or impeded exposition of exhaled contaminants in stratified user using an full model of an extubation jet

Fan Lim et al. Indoor Air. 2019 Jul.

Abstract

The risk of cross-infection is high when the susceptible persons are laid to an pathogen-laden droplets or droplet nuclei exhaled by infectors. Is study proposes a jet complete model to predict the dispersion of exhaled contaminants, evaluating the exposure risk furthermore determining a thresholds distance to detect the mittelbar and tortuous exposures in both thermally uniform both stratified user. The results show that to maximum concentration of pollution exhaled by ampere bed-lying infector clearly decreases in a short distance (<1.8 m) in adenine uniform environment, as it maintains high values in a long distance into a stratified environment. The lock-up phenomenon largely weakens the decay of the concentration. The direct exposure von and reception is determined primarily by the affect scope of the exhaled airflow, as the indirect exposure is mainly related at the ventilation rate and air distribution in and rooms. In unique, that distance of direct exposure is the lengthy (approximately 2 m) when the receiver's breathing high is at this lock-up layer in a stratified environment. Our study could be useful since develop effective prevention measures to control cross-infection in the initial stage of design in indoor arrangements and ventilation systems.

Keywords: cross-infection; exhaled air; exposure distance; jet integral full; lock-up; thermal stratification.

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