File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Characterization of expiration air jets and droplet size distributions immediately at the mouth opening

TitleCharacterization of expiration air jets and droplet size distributions immediately at the mouth opening
Authors
KeywordsCoughing
Expiratory droplets
Interferometric Mie imaging
Particle image velocimetry
Speaking
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jaerosci
Citation
Journal Of Aerosol Science, 2009, v. 40 n. 2, p. 122-133 How to Cite?
AbstractSize distributions of expiratory droplets expelled during coughing and speaking and the velocities of the expiration air jets of healthy volunteers were measured. Droplet size was measured using the interferometric Mie imaging (IMI) technique while the particle image velocimetry (PIV) technique was used for measuring air velocity. These techniques allowed measurements in close proximity to the mouth and avoided air sampling losses. The average expiration air velocity was 11.7 m/s for coughing and 3.9 m/s for speaking. Under the experimental setting, evaporation and condensation effects had negligible impact on the measured droplet size. The geometric mean diameter of droplets from coughing was 13.5 μm and it was 16.0 μm for speaking (counting 1-100). The estimated total number of droplets expelled ranged from 947 to 2085 per cough and 112-6720 for speaking. The estimated droplet concentrations for coughing ranged from 2.4 to 5.2 cm -3 per cough and 0.004-0.223 cm -3 for speaking. © 2008 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/59068
ISSN
2015 Impact Factor: 2.278
2015 SCImago Journal Rankings: 1.702
ISI Accession Number ID
Funding AgencyGrant Number
Australian Research Council Discovery ProjectDP0558410
Hong Kong RGC611505
Funding Information:

This research was jointly supported by the Australian Research Council Discovery Project DP0558410 and Hong Kong RGC Grant 611505. The expiratory droplet investigation Setup and other related laser safety installations were provided by the international Laboratory for Air Quality and Health, Queensland University of Technology. The IMI and PIV systems were provided by The Hong Kong University of Science and Technology. Technical support provided by the mechanical workshop of the Faculty of Science, Queensland University of Technology is greatly appreciated.

References

 

DC FieldValueLanguage
dc.contributor.authorChao, CYHen_HK
dc.contributor.authorWan, MPen_HK
dc.contributor.authorMorawska, Len_HK
dc.contributor.authorJohnson, GRen_HK
dc.contributor.authorRistovski, ZDen_HK
dc.contributor.authorHargreaves, Men_HK
dc.contributor.authorMengersen, Ken_HK
dc.contributor.authorCorbett, Sen_HK
dc.contributor.authorLi, Yen_HK
dc.contributor.authorXie, Xen_HK
dc.contributor.authorKatoshevski, Den_HK
dc.date.accessioned2010-05-31T03:42:20Z-
dc.date.available2010-05-31T03:42:20Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of Aerosol Science, 2009, v. 40 n. 2, p. 122-133en_HK
dc.identifier.issn0021-8502en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59068-
dc.description.abstractSize distributions of expiratory droplets expelled during coughing and speaking and the velocities of the expiration air jets of healthy volunteers were measured. Droplet size was measured using the interferometric Mie imaging (IMI) technique while the particle image velocimetry (PIV) technique was used for measuring air velocity. These techniques allowed measurements in close proximity to the mouth and avoided air sampling losses. The average expiration air velocity was 11.7 m/s for coughing and 3.9 m/s for speaking. Under the experimental setting, evaporation and condensation effects had negligible impact on the measured droplet size. The geometric mean diameter of droplets from coughing was 13.5 μm and it was 16.0 μm for speaking (counting 1-100). The estimated total number of droplets expelled ranged from 947 to 2085 per cough and 112-6720 for speaking. The estimated droplet concentrations for coughing ranged from 2.4 to 5.2 cm -3 per cough and 0.004-0.223 cm -3 for speaking. © 2008 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jaeroscien_HK
dc.relation.ispartofJournal of Aerosol Scienceen_HK
dc.subjectCoughingen_HK
dc.subjectExpiratory dropletsen_HK
dc.subjectInterferometric Mie imagingen_HK
dc.subjectParticle image velocimetryen_HK
dc.subjectSpeakingen_HK
dc.titleCharacterization of expiration air jets and droplet size distributions immediately at the mouth openingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-8502&volume=40&issue=2&spage=122&epage=133&date=2009&atitle=Characterization+of+expiration+air+jets+and+droplet+size+distributions+immediately+at+the+mouth+opening-
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jaerosci.2008.10.003en_HK
dc.identifier.scopuseid_2-s2.0-58349094547en_HK
dc.identifier.hkuros161310en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58349094547&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume40en_HK
dc.identifier.issue2en_HK
dc.identifier.spage122en_HK
dc.identifier.epage133en_HK
dc.identifier.isiWOS:000263619100004-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChao, CYH=13309813600en_HK
dc.identifier.scopusauthoridWan, MP=7202684953en_HK
dc.identifier.scopusauthoridMorawska, L=7004773965en_HK
dc.identifier.scopusauthoridJohnson, GR=7405718469en_HK
dc.identifier.scopusauthoridRistovski, ZD=7004239407en_HK
dc.identifier.scopusauthoridHargreaves, M=7102677780en_HK
dc.identifier.scopusauthoridMengersen, K=6603793565en_HK
dc.identifier.scopusauthoridCorbett, S=7005952289en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridXie, X=14627859000en_HK
dc.identifier.scopusauthoridKatoshevski, D=6603832111en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats