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Article: Numerical and experimental study of velocity and temperature characteristics in a ventilated enclosure with underfloor ventilation systems

TitleNumerical and experimental study of velocity and temperature characteristics in a ventilated enclosure with underfloor ventilation systems
Authors
KeywordsBuoyancy flux
Underfloor ventilation
Thermal length scale
Temperature stratification
Supply jet
Momentum flux
Issue Date2005
Citation
Indoor Air, 2005, v. 15, n. 5, p. 342-355 How to Cite?
AbstractAirflow and temperature distributions in an enclosure with heat sources ventilated by floor supply jets with floor or ceiling air exit vents were investigated using experimental and numerical approaches. These ventilation configurations represent the floor return or the top return underfloor ventilation systems found in real applications. Experiments and numerical simulations were performed on a full-sized environmental chamber. The results reveal that the temperature stratification in the enclosure highly depended on the thermal length scale of the floor supply jets. When the thermal length scale of the supply jet was ≫1, temperature stratification was minor for all tested heat densities and air distribution methods. Significant vertical temperature gradients occurred when the jet thermal length scale was ≪1. Changes in air distribution methods also became significant for temperature stratification at small supply jet thermal length scales. Temperature stratification also affected the terminal height of the momentum-dominant region of the vertical buoyant supply jets. The applicability of these results to underfloor ventilation design was also discussed. © Indoor Air (2005).
Persistent Identifierhttp://hdl.handle.net/10722/255868
ISSN
2023 Impact Factor: 4.3
2023 SCImago Journal Rankings: 0.997
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWan, M. P.-
dc.contributor.authorChao, C. Y.-
dc.date.accessioned2018-07-16T06:13:54Z-
dc.date.available2018-07-16T06:13:54Z-
dc.date.issued2005-
dc.identifier.citationIndoor Air, 2005, v. 15, n. 5, p. 342-355-
dc.identifier.issn0905-6947-
dc.identifier.urihttp://hdl.handle.net/10722/255868-
dc.description.abstractAirflow and temperature distributions in an enclosure with heat sources ventilated by floor supply jets with floor or ceiling air exit vents were investigated using experimental and numerical approaches. These ventilation configurations represent the floor return or the top return underfloor ventilation systems found in real applications. Experiments and numerical simulations were performed on a full-sized environmental chamber. The results reveal that the temperature stratification in the enclosure highly depended on the thermal length scale of the floor supply jets. When the thermal length scale of the supply jet was ≫1, temperature stratification was minor for all tested heat densities and air distribution methods. Significant vertical temperature gradients occurred when the jet thermal length scale was ≪1. Changes in air distribution methods also became significant for temperature stratification at small supply jet thermal length scales. Temperature stratification also affected the terminal height of the momentum-dominant region of the vertical buoyant supply jets. The applicability of these results to underfloor ventilation design was also discussed. © Indoor Air (2005).-
dc.languageeng-
dc.relation.ispartofIndoor Air-
dc.subjectBuoyancy flux-
dc.subjectUnderfloor ventilation-
dc.subjectThermal length scale-
dc.subjectTemperature stratification-
dc.subjectSupply jet-
dc.subjectMomentum flux-
dc.titleNumerical and experimental study of velocity and temperature characteristics in a ventilated enclosure with underfloor ventilation systems-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1600-0668.2005.00378.x-
dc.identifier.pmid16108907-
dc.identifier.scopuseid_2-s2.0-24044517477-
dc.identifier.volume15-
dc.identifier.issue5-
dc.identifier.spage342-
dc.identifier.epage355-
dc.identifier.isiWOS:000231285000007-
dc.identifier.issnl0905-6947-

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