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Article: Wind driven 'pumping' fluid flow and turbulent mean oscillation across high-rise building enclosures with multiple naturally ventilated apertures

TitleWind driven 'pumping' fluid flow and turbulent mean oscillation across high-rise building enclosures with multiple naturally ventilated apertures
Authors
KeywordsFull CFD simulation
Single-sided ventilation
Vortex shedding
Contaminant dispersion
Issue Date2019
PublisherElsevier BV. The Journal's web site is located at http://www.journals.elsevier.com/sustainable-cities-and-society/
Citation
Sustainable Cities and Society, 2019, v. 50, p. article no. 101619 How to Cite?
AbstractThis paper presents a study on the impact of incoming wind velocity magnitudes and horizontal aperture separations on natural ventilation flows in a single-sided wind-driven naturally ventilated building with two apertures (SS2) on the rear wall or the front wall. Both the velocity fields and the contaminant concentration fields were simulated and investigated. The present study is based on CFD simulations with unsteady Reynolds-averaged Navier-Stokes (URANS) SST k-ω model. A vortex shedding flow mechanism has been identified when the two apertures are mounted either on the rear wall or on the front wall, through which the air flow oscillates at a certain rate. CFD results further demonstrate that the oscillating frequency increases with the incoming wind magnitude and is nearly independent of the horizontal aperture separations. For the same building configuration, the root mean square (r.m.s) of the non-dimensional ventilation flow rate is independent of the incoming wind speed, whereas it decreases when the horizontal aperture separation is reduced. The time-averaged contaminant concentration fields also validated the different ventilation performance of different aperture configurations. This novel ventilation mechanism could be applied to alleviate the poor ventilation performance of buildings with single-sided apertures.
Persistent Identifierhttp://hdl.handle.net/10722/278205
ISSN
2020 Impact Factor: 7.587
2015 SCImago Journal Rankings: 0.804
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhong, HY-
dc.contributor.authorZhang, DD-
dc.contributor.authorLiu, Y-
dc.contributor.authorLiu, D-
dc.contributor.authorZhao, FY-
dc.contributor.authorLi, Y-
dc.date.accessioned2019-10-04T08:09:30Z-
dc.date.available2019-10-04T08:09:30Z-
dc.date.issued2019-
dc.identifier.citationSustainable Cities and Society, 2019, v. 50, p. article no. 101619-
dc.identifier.issn2210-6707-
dc.identifier.urihttp://hdl.handle.net/10722/278205-
dc.description.abstractThis paper presents a study on the impact of incoming wind velocity magnitudes and horizontal aperture separations on natural ventilation flows in a single-sided wind-driven naturally ventilated building with two apertures (SS2) on the rear wall or the front wall. Both the velocity fields and the contaminant concentration fields were simulated and investigated. The present study is based on CFD simulations with unsteady Reynolds-averaged Navier-Stokes (URANS) SST k-ω model. A vortex shedding flow mechanism has been identified when the two apertures are mounted either on the rear wall or on the front wall, through which the air flow oscillates at a certain rate. CFD results further demonstrate that the oscillating frequency increases with the incoming wind magnitude and is nearly independent of the horizontal aperture separations. For the same building configuration, the root mean square (r.m.s) of the non-dimensional ventilation flow rate is independent of the incoming wind speed, whereas it decreases when the horizontal aperture separation is reduced. The time-averaged contaminant concentration fields also validated the different ventilation performance of different aperture configurations. This novel ventilation mechanism could be applied to alleviate the poor ventilation performance of buildings with single-sided apertures.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.journals.elsevier.com/sustainable-cities-and-society/-
dc.relation.ispartofSustainable Cities and Society-
dc.subjectFull CFD simulation-
dc.subjectSingle-sided ventilation-
dc.subjectVortex shedding-
dc.subjectContaminant dispersion-
dc.titleWind driven 'pumping' fluid flow and turbulent mean oscillation across high-rise building enclosures with multiple naturally ventilated apertures-
dc.typeArticle-
dc.identifier.emailLi, Y: liyg@hku.hk-
dc.identifier.authorityLi, Y=rp00151-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.scs.2019.101619-
dc.identifier.scopuseid_2-s2.0-85067061231-
dc.identifier.hkuros306609-
dc.identifier.volume50-
dc.identifier.spagearticle no. 101619-
dc.identifier.epagearticle no. 101619-
dc.identifier.isiWOS:000484255800009-
dc.publisher.placeNetherlands-
dc.identifier.issnl2210-6707-

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