The airborne transmission of infection between flats in high-rise residential buildings: Particle simulation
Identifieur interne : 002F93 ( Main/Exploration ); précédent : 002F92; suivant : 002F94The airborne transmission of infection between flats in high-rise residential buildings: Particle simulation
Auteurs : N. P. Gao [Hong Kong] ; J. L. Niu [Hong Kong] ; M. Perino [Italie] ; P. Heiselberg [Danemark]Source :
- Building and Environment [ 0360-1323 ] ; 2008.
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.
Url:
DOI: 10.1016/j.buildenv.2008.03.016
PubMed: NONE
PubMed Central: 7116967
Affiliations:
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P." last="Gao">N. P. Gao</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong</nlm:aff><country xml:lang="fr">Hong Kong</country><wicri:regionArea>Department of Building Services Engineering, The Hong Kong Polytechnic University</wicri:regionArea><wicri:noRegion>The Hong Kong Polytechnic University</wicri:noRegion></affiliation></author><author><name sortKey="Niu, J L" sort="Niu, J L" uniqKey="Niu J" first="J. L." last="Niu">J. L. Niu</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong</nlm:aff><country xml:lang="fr">Hong Kong</country><wicri:regionArea>Department of Building Services Engineering, The Hong Kong Polytechnic University</wicri:regionArea><wicri:noRegion>The Hong Kong Polytechnic University</wicri:noRegion></affiliation></author><author><name sortKey="Perino, M" sort="Perino, M" uniqKey="Perino M" first="M." last="Perino">M. Perino</name><affiliation wicri:level="1"><nlm:aff id="aff2">DENER, Politecnico di Torino, Corso Duca degli Abruzzi, 24, I-10129 Torino, Italy</nlm:aff><country xml:lang="fr">Italie</country><wicri:regionArea>DENER, Politecnico di Torino, Corso Duca degli Abruzzi, 24, I-10129 Torino</wicri:regionArea><wicri:noRegion>I-10129 Torino</wicri:noRegion></affiliation></author><author><name sortKey="Heiselberg, P" sort="Heiselberg, P" uniqKey="Heiselberg P" first="P." last="Heiselberg">P. Heiselberg</name><affiliation wicri:level="4"><nlm:aff id="aff3">Hybrid Ventilation Centre, Aalborg University, Sohngaardsholmsvej 57, DK-9000 Aalborg, Denmark</nlm:aff><country xml:lang="fr">Danemark</country><wicri:regionArea>Hybrid Ventilation Centre, Aalborg University, Sohngaardsholmsvej 57, DK-9000 Aalborg</wicri:regionArea><orgName type="university">Université d'Aalborg</orgName><placeName><settlement type="city">Aalborg</settlement><region nuts="2" type="region">Jutland du Nord</region></placeName></affiliation></author></analytic><series><title level="j">Building and Environment</title><idno type="ISSN">0360-1323</idno><idno type="eISSN">1873-684X</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>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.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Yu, I T S" uniqKey="Yu I">I.T.S. Yu</name></author><author><name sortKey="Li, Y G" uniqKey="Li Y">Y.G. Li</name></author><author><name sortKey="Wong, T W" uniqKey="Wong T">T.W. Wong</name></author><author><name sortKey="Tam, W" uniqKey="Tam W">W. Tam</name></author><author><name sortKey="Chan, A" uniqKey="Chan A">A. Chan</name></author><author><name sortKey="Lee, J H W" uniqKey="Lee J">J.H.W. Lee</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Li, Y" uniqKey="Li Y">Y. Li</name></author><author><name sortKey="Huang, X" uniqKey="Huang X">X. Huang</name></author><author><name sortKey="Yu, I T S" uniqKey="Yu I">I.T.S. Yu</name></author><author><name sortKey="Wong, T W" uniqKey="Wong T">T.W. 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Niu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Uijttewaal, W S J" uniqKey="Uijttewaal W">W.S.J. Uijttewaal</name></author><author><name sortKey="Oliemans, R V A" uniqKey="Oliemans R">R.V.A. Oliemans</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Beghein, C" uniqKey="Beghein C">C. Béghein</name></author><author><name sortKey="Jiang, Y" uniqKey="Jiang Y">Y. Jiang</name></author><author><name sortKey="Chen, Q" uniqKey="Chen Q">Q. Chen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Li, X X" uniqKey="Li X">X.X. Li</name></author><author><name sortKey="Liu, C H" uniqKey="Liu C">C.H. Liu</name></author><author><name sortKey="Leung, D Y C" uniqKey="Leung D">D.Y.C. Leung</name></author><author><name sortKey="Lam, K M" uniqKey="Lam K">K.M. Lam</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Duguid, J P" uniqKey="Duguid J">J.P. Duguid</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Danemark</li><li>Hong Kong</li><li>Italie</li></country><region><li>Jutland du Nord</li></region><settlement><li>Aalborg</li></settlement><orgName><li>Université d'Aalborg</li></orgName></list><tree><country name="Hong Kong"><noRegion><name sortKey="Gao, N P" sort="Gao, N P" uniqKey="Gao N" first="N. P." last="Gao">N. P. Gao</name></noRegion><name sortKey="Niu, J L" sort="Niu, J L" uniqKey="Niu J" first="J. L." last="Niu">J. L. Niu</name></country><country name="Italie"><noRegion><name sortKey="Perino, M" sort="Perino, M" uniqKey="Perino M" first="M." last="Perino">M. Perino</name></noRegion></country><country name="Danemark"><region name="Jutland du Nord"><name sortKey="Heiselberg, P" sort="Heiselberg, P" uniqKey="Heiselberg P" first="P." last="Heiselberg">P. Heiselberg</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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