Archivio Istituzionale della RicercaSeveralcaseclustersoccurredinhigh-riseresidentialbuildingsinHongKonginthe2003SARS(the severe acuterespiratorysyndrome)epidemic,whichmotivatedaseriesofengineeringinvestigations into thepossibleairbornetransportroutes.Itissuspectedthat,drivenbybuoyancyforce,thepolluted air thatexitsthewindowofthelowerfloormayre-entertheimmediateupperfloorthroughthe window onthesameside.Thiscascadeeffecthasbeenquantifiedandreportedinapreviouspaper,and it isfoundthat,bytracergasconcentrationanalysis,theroomintheadjacentupstairsmaycontainupto 7% oftheairdirectlyfromthedownstairsroom.Inthisstudy,aftervalidationagainsttheexperimental data fromliteratures,EulerianandLagrangianapproachesarebothadoptedtonumericallyinvestigate the dispersionofexpiratoryaerosolsbetweentwoverticallyadjacentflats.Itisfoundthattheparticle concentrationintheupperflooristwotothreeordersofmagnitudelowerthaninthesourcefloor. 1.0 mm particlesdisperselikegaseouspollutants.Forcoarseparticleslargerthan20.0 mm, strong depositiononsolidsurfacesandgravitationalsettlingeffectgreatlylimittheirupwardtransport.
The airborne transmission of infection between flats in high-rise residential buildings: Particle simulation / Gao, N. P.; Niu, J. L.; Perino, Marco; Heiselberg, P.. - In: BUILDING AND ENVIRONMENT. - ISSN 0360-1323. - STAMPA. - 44 - 2:(2009), pp. 402-410. [10.1016/j.buildenv.2008.03.016]
The airborne transmission of infection between flats in high-rise residential buildings: Particle simulation
PERINO, Marco;
2009
Abstract
Severalcaseclustersoccurredinhigh-riseresidentialbuildingsinHongKonginthe2003SARS(the severe acuterespiratorysyndrome)epidemic,whichmotivatedaseriesofengineeringinvestigations into thepossibleairbornetransportroutes.Itissuspectedthat,drivenbybuoyancyforce,thepolluted air thatexitsthewindowofthelowerfloormayre-entertheimmediateupperfloorthroughthe window onthesameside.Thiscascadeeffecthasbeenquantifiedandreportedinapreviouspaper,and it isfoundthat,bytracergasconcentrationanalysis,theroomintheadjacentupstairsmaycontainupto 7% oftheairdirectlyfromthedownstairsroom.Inthisstudy,aftervalidationagainsttheexperimental data fromliteratures,EulerianandLagrangianapproachesarebothadoptedtonumericallyinvestigate the dispersionofexpiratoryaerosolsbetweentwoverticallyadjacentflats.Itisfoundthattheparticle concentrationintheupperflooristwotothreeordersofmagnitudelowerthaninthesourcefloor. 1.0 mm particlesdisperselikegaseouspollutants.Forcoarseparticleslargerthan20.0 mm, strong depositiononsolidsurfacesandgravitationalsettlingeffectgreatlylimittheirupwardtransport.
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https://hdl.handle.net/11583/2364917
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