Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11579
Title: The airborne transmission of infection between flats in high-rise residential buildings : tracer gas simulation
Authors: Gao, NP
Niu, JL 
Perino, M
Heiselberg, P
Keywords: Airborne transmission
Cascade effect
Computational fluid dynamics (CFD)
High-rise residential buildings
Tracer gas
Issue Date: 2008
Publisher: Pergamon Press
Source: Building and environment, 2008, v. 43, no. 11, p. 1805-1817 How to cite?
Journal: Building and environment 
Abstract: Airborne transmission of infectious respiratory diseases in indoor environments has drawn our attention for decades, and this issue is revitalized with the outbreak of severe acute respiratory syndrome (SARS). One of the concerns is that there may be multiple transmission routes across households in high-rise residential buildings, one of which is the natural ventilative airflow through open windows between flats, caused by buoyancy effects. Our early on-site measurement using tracer gases confirmed qualitatively and quantitatively that the re-entry of the exhaust-polluted air from the window of the lower floor into the adjacent upper floor is a fact. This study presents the modeling of this cascade effect using computational fluid dynamics (CFD) technique. It is found that the presence of the pollutants generated in the lower floor is generally lower in the immediate upper floor by two orders of magnitude, but the risk of infection calculated by the Wells-Riley equation is only around one order of magnitude lower. It is found that, with single-side open-window conditions, wind blowing perpendicularly to the building may either reinforce or suppress the upward transport, depending on the wind speed. High-speed winds can restrain the convective transfer of heat and mass between flats, functioning like an air curtain. Despite the complexities of the air flow involved, it is clear that this transmission route should be taken into account in infection control.
URI: http://hdl.handle.net/10397/11579
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2007.10.023
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

66
Last Week
0
Last month
2
Citations as of Sep 8, 2017

WEB OF SCIENCETM
Citations

56
Last Week
0
Last month
2
Citations as of Sep 14, 2017

Page view(s)

47
Last Week
1
Last month
Checked on Sep 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.