The Airborne Transmission of Infection Between Flats in High-rise Residential Buildings: Particle Simulation

N. P. Gao, J. L. Niu, M. Perino, Per Heiselberg

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

50 Citationer (Scopus)

Resumé

Several case clusters occurred in high-rise residential buildings in Hong Kong in the 2003 SARS (the severe acute respiratory syndrome) epidemic, which motivated a series of engineering investigations into the possible airborne transport routes. It is suspected that, driven by buoyancy force, the polluted air that exits the window of the lower floor may re-enter the immediate upper floor through the window on the same side. This cascade effect has been quantified and reported in a previous paper, and it is found that, by tracer gas concentration analysis, the room in the adjacent upstairs may contain up to 7% of the air directly from the downstairs room. In this study, after validation against the experimental data from literatures, Eulerian and Lagrangian approaches are both adopted to numerically investigate the dispersion of expiratory aerosols between two vertically adjacent flats. It is found that the particle concentration in the upper floor is two to three orders of magnitude lower than in the source floor. 1.0 μm particles disperse like gaseous pollutants. For coarse particles larger than 20.0 μm, strong deposition on solid surfaces and gravitational settling effect greatly limit their upward transport.
Udgivelsesdato: Feb
OriginalsprogEngelsk
TidsskriftBuilding and Environment
Vol/bind44
Udgave nummer2
Sider (fra-til)402-410
Antal sider9
ISSN0360-1323
DOI
StatusUdgivet - 2009

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residential building
air
simulation
settling
pollutant
Hong Kong
engineering
severe acute respiratory syndrome
Air
Buoyancy
buoyancy
Aerosols
tracer
aerosol
particle
infection
Gases
gas
literature
effect

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title = "The Airborne Transmission of Infection Between Flats in High-rise Residential Buildings: Particle Simulation",
abstract = "Several case clusters occurred in high-rise residential buildings in Hong Kong in the 2003 SARS (the severe acute respiratory syndrome) epidemic, which motivated a series of engineering investigations into the possible airborne transport routes. It is suspected that, driven by buoyancy force, the polluted air that exits the window of the lower floor may re-enter the immediate upper floor through the window on the same side. This cascade effect has been quantified and reported in a previous paper, and it is found that, by tracer gas concentration analysis, the room in the adjacent upstairs may contain up to 7{\%} of the air directly from the downstairs room. In this study, after validation against the experimental data from literatures, Eulerian and Lagrangian approaches are both adopted to numerically investigate the dispersion of expiratory aerosols between two vertically adjacent flats. It is found that the particle concentration in the upper floor is two to three orders of magnitude lower than in the source floor. 1.0 μm particles disperse like gaseous pollutants. For coarse particles larger than 20.0 μm, strong deposition on solid surfaces and gravitational settling effect greatly limit their upward transport.",
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author = "Gao, {N. P.} and Niu, {J. L.} and M. Perino and Per Heiselberg",
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The Airborne Transmission of Infection Between Flats in High-rise Residential Buildings : Particle Simulation. / Gao, N. P.; Niu, J. L.; Perino, M.; Heiselberg, Per.

I: Building and Environment, Bind 44, Nr. 2, 2009, s. 402-410.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - The Airborne Transmission of Infection Between Flats in High-rise Residential Buildings

T2 - Particle Simulation

AU - Gao, N. P.

AU - Niu, J. L.

AU - Perino, M.

AU - Heiselberg, Per

PY - 2009

Y1 - 2009

N2 - Several case clusters occurred in high-rise residential buildings in Hong Kong in the 2003 SARS (the severe acute respiratory syndrome) epidemic, which motivated a series of engineering investigations into the possible airborne transport routes. It is suspected that, driven by buoyancy force, the polluted air that exits the window of the lower floor may re-enter the immediate upper floor through the window on the same side. This cascade effect has been quantified and reported in a previous paper, and it is found that, by tracer gas concentration analysis, the room in the adjacent upstairs may contain up to 7% of the air directly from the downstairs room. In this study, after validation against the experimental data from literatures, Eulerian and Lagrangian approaches are both adopted to numerically investigate the dispersion of expiratory aerosols between two vertically adjacent flats. It is found that the particle concentration in the upper floor is two to three orders of magnitude lower than in the source floor. 1.0 μm particles disperse like gaseous pollutants. For coarse particles larger than 20.0 μm, strong deposition on solid surfaces and gravitational settling effect greatly limit their upward transport.

AB - Several case clusters occurred in high-rise residential buildings in Hong Kong in the 2003 SARS (the severe acute respiratory syndrome) epidemic, which motivated a series of engineering investigations into the possible airborne transport routes. It is suspected that, driven by buoyancy force, the polluted air that exits the window of the lower floor may re-enter the immediate upper floor through the window on the same side. This cascade effect has been quantified and reported in a previous paper, and it is found that, by tracer gas concentration analysis, the room in the adjacent upstairs may contain up to 7% of the air directly from the downstairs room. In this study, after validation against the experimental data from literatures, Eulerian and Lagrangian approaches are both adopted to numerically investigate the dispersion of expiratory aerosols between two vertically adjacent flats. It is found that the particle concentration in the upper floor is two to three orders of magnitude lower than in the source floor. 1.0 μm particles disperse like gaseous pollutants. For coarse particles larger than 20.0 μm, strong deposition on solid surfaces and gravitational settling effect greatly limit their upward transport.

KW - Particles

KW - Lagrangian method

KW - Eulerian method

KW - Transport

KW - Deposition

U2 - doi:10.1016/j.buildenv.2008.03.016

DO - doi:10.1016/j.buildenv.2008.03.016

M3 - Journal article

VL - 44

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JO - Building and Environment

JF - Building and Environment

SN - 0360-1323

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