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Article: Enhancement of submicron particle deposition on a semi-circular surface in turbulent flow

TitleEnhancement of submicron particle deposition on a semi-circular surface in turbulent flow
Authors
KeywordsAirflow and computational fluid dynamics
Particle deposition enhancement
Semi-circular structured surface
Submicron particles
Turbulent flow
Issue Date2019
PublisherSage Publications Ltd. The Journal's web site is located at http://ibe.sagepub.com
Citation
Indoor and Built Environment, 2019, v. 29 n. 1, p. 101-116 How to Cite?
AbstractAir pollution due to suspended particles in the built environment threatens people’s health. The collection of submicron particles using air cleaners is especially difficult due to their tiny sizes. Surface patterned structures can enhance submicron particle deposition, thus improving the performance of an air cleaner. In this study, a semi-circular micro-structured surface was designed and optimized by considering particle deposition enhancement and reduction of pressure differential. The maximum efficiency ratio at the pitch-to-height ratio (α) of 3 reached 1137 for the 1 µm particles but only 3.4 for 0.01 µm particles. The main mechanism of enhancing submicron particle deposition depends on the capture of the recirculation wake induced by semi-circular structures and entrainments of large turbulence kinetic energy to the near-wall regions. Submicron particles was observed to deposit between cavities on the semi-circular surface at a small α. This study shows that surface patterned structures in the semi-circular shape at small α can enhance the submicron deposition efficiency, thus providing a possible approach to improve the overall efficiency of air cleaners.
Persistent Identifierhttp://hdl.handle.net/10722/271235
ISSN
2019 Impact Factor: 1.9
2015 SCImago Journal Rankings: 0.522

 

DC FieldValueLanguage
dc.contributor.authorXu, H-
dc.contributor.authorFu, SC-
dc.contributor.authorLeung, WT-
dc.contributor.authorLai, TW-
dc.contributor.authorChao, CYH-
dc.date.accessioned2019-06-24T01:05:57Z-
dc.date.available2019-06-24T01:05:57Z-
dc.date.issued2019-
dc.identifier.citationIndoor and Built Environment, 2019, v. 29 n. 1, p. 101-116-
dc.identifier.issn1420-326X-
dc.identifier.urihttp://hdl.handle.net/10722/271235-
dc.description.abstractAir pollution due to suspended particles in the built environment threatens people’s health. The collection of submicron particles using air cleaners is especially difficult due to their tiny sizes. Surface patterned structures can enhance submicron particle deposition, thus improving the performance of an air cleaner. In this study, a semi-circular micro-structured surface was designed and optimized by considering particle deposition enhancement and reduction of pressure differential. The maximum efficiency ratio at the pitch-to-height ratio (α) of 3 reached 1137 for the 1 µm particles but only 3.4 for 0.01 µm particles. The main mechanism of enhancing submicron particle deposition depends on the capture of the recirculation wake induced by semi-circular structures and entrainments of large turbulence kinetic energy to the near-wall regions. Submicron particles was observed to deposit between cavities on the semi-circular surface at a small α. This study shows that surface patterned structures in the semi-circular shape at small α can enhance the submicron deposition efficiency, thus providing a possible approach to improve the overall efficiency of air cleaners.-
dc.languageeng-
dc.publisherSage Publications Ltd. The Journal's web site is located at http://ibe.sagepub.com-
dc.relation.ispartofIndoor and Built Environment-
dc.rightsIndoor and Built Environment. Copyright © Sage Publications Ltd.-
dc.rightsCopyright © [year] (Copyright Holder). DOI: [DOI number]-
dc.subjectAirflow and computational fluid dynamics-
dc.subjectParticle deposition enhancement-
dc.subjectSemi-circular structured surface-
dc.subjectSubmicron particles-
dc.subjectTurbulent flow-
dc.titleEnhancement of submicron particle deposition on a semi-circular surface in turbulent flow-
dc.typeArticle-
dc.identifier.emailFu, SC: scfu@hku.hk-
dc.identifier.emailChao, CYH: cyhchao@hku.hk-
dc.identifier.authorityFu, SC=rp02549-
dc.identifier.authorityChao, CYH=rp02396-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1177/1420326X19853862-
dc.identifier.scopuseid_2-s2.0-85067805740-
dc.identifier.hkuros298119-
dc.identifier.volume29-
dc.identifier.issue1-
dc.identifier.spage101-
dc.identifier.epage116-
dc.publisher.placeUnited Kingdom-

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