An experimental study of bioaerosol (1–10 μm) deposition in a ventilated chamber

Lai, Alvin C.K.; Wong, Ling Tim; Mui, Kwok Wai; Chan, Wing-Shing; Yu, H. C.

doi:10.1016/j.buildenv.2012.02.027

Cited by 13 publications

(17 citation statements)

References 42 publications

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“…The dispersion of particles as a consequence of turbulence in the flow field can be tracked through stochastic tracking methods. The discrete random walk (DRW) model, a popular approach that takes velocity fluctuations into account, was employed in this study (Lai et al 2012). Further details for the CFD simulations are summarized in Table 1.…”

Section: Particle Modellingmentioning

confidence: 99%

A numerical study of ventilation strategies for infection risk mitigation in general inpatient wards

2020

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Section: Particle Modellingmentioning

confidence: 99%

A numerical study of ventilation strategies for infection risk mitigation in general inpatient wards

2020

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“…However, realistic aerosols are nonspherical, which would influence the aerosol concentration, orientation and distribution, the particle deposition speed, and settling behaviour [41,42]. For instance, Lai et al reported both laboratory and numerical investigations on bioaerosol deposition within a ventilation chamber [43]. Better comparisons between experiment and numerical results were achieved when the nonspherical aerosol shape was considered.…”

Section: Influencing Analysis Of Bend-induced Depositionmentioning

confidence: 99%

Experimental Views of Tran-Bend Particle Deposition in Turbulent Flow with Nanoscale Effect

Zhou

Sun

Jiang

et al. 2018

Journal of Nanotechnology

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This paper presented experimental views of nano- and microaerosol distribution and deposition in turbulent tran-bend flows. These views included the particle flow measurement and particle depositions through individual bends, bifurcation bends, and those behind bends. Selected experiments were summarized and compared according to the gas flow, the bend geometry, and the particle flow properties. Based on recent studies, the influencing factors of environmental humidity, particle and surface properties, nanoparticle formation, coagulation, or evolution phenomena were discussed, and then research suggestions were given for future research and applications. It is specially mentioned that the new particle formation and nanoparticle growth affect its deposition under environmental contaminant conditions; nanoscale particle dynamics and transport have a growing trend on attracting the research and industry attentions.

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“…15,18,19 where F bp is the force acting on a bioaerosol particle (N), F drag is the drag force (N), F grav is the gravity force, and F SL is Saffman’s lift force for an inviscid fluid. 20,21 F Brown is the Brownian force for submicron bioaerosol particle. 22 In addition, the Cunningham slip correction factor f slip was also recommended in drag force F drag in the submicron range in equation (2).…”

Section: Two-phase Flow Cfd Models For Bioaerosol Particle Simulationmentioning

confidence: 99%

Numerical simulation of bioaerosol particle exposure assessment in office environment from MVAC systems

Mui

Wong

2017

The Journal of Computational Multiphase Flows

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Bioaerosol (i.e. biological aerosol) exposures in the office environment are associated with a wide range of health effects. The potential bioaerosol emission from mechanical ventilation and air conditioning (MVAC) systems can endanger the building occupants in office, especially as over 90% of commercial buildings in Hong Kong that are equipped with MVAC systems, due to the microbial growths inside MVAC systems, such as cooling coils and mixing chamber, were reported. This study evaluated the exposure risk of the bioaerosol emission from the MVAC systems to the building occupants. A two-phase flow computational fluid dynamics approach was adopted to simulate the emission, dispersion, deposition, and exhaustion of bioaerosol particles from the MVAC systems in a typical office cubicle by altering the ventilation strategies with four ventilation rates, four emission concentrations, and two microorganism species. The results reported that about 5% contribution of concentration level from the MVAC system including the ventilation rate is sufficient to dilute the biocontainment. This study suggested the importance of the maintenance strategies of MVAC systems for minimizing bioaerosol exposures in offices.

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An experimental study of bioaerosol (1–10 μm) deposition in a ventilated chamber

Cited by 13 publications

References 42 publications

A numerical study of ventilation strategies for infection risk mitigation in general inpatient wards

A numerical study of ventilation strategies for infection risk mitigation in general inpatient wards

Experimental Views of Tran-Bend Particle Deposition in Turbulent Flow with Nanoscale Effect

Numerical simulation of bioaerosol particle exposure assessment in office environment from MVAC systems

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