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Conference Paper: Adjustment of roughness sublayer in turbulent flows over two-dimensional idealised roughness elements

TitleAdjustment of roughness sublayer in turbulent flows over two-dimensional idealised roughness elements
Authors
Issue Date2015
PublisherCopernicus GmbH. The Journal's web site is located at http://www.geophysical-research-abstracts.net
Citation
The 2015 General Assembly of the European Geosciences Union (EGU), Vienna, Austria, 12-17 April 2015. In Geophysical Research Abstracts, 2015, v. 17, no. EGU2015-5064 How to Cite?
AbstractThe atmospheric boundary layer (ABL) immediately above the urban canopy is the roughness sublayer (RSL). In this layer, flows and turbulence are strongly affected by the roughness elements beneath, e.g. building obstacles. The wind flows over urban areas could be represented by conventional logarithmic law of the wall (log-law) in the neutrally stratified ABL. However, in the RSL region, the vertical wind profile deviates from that predicted from log-law and the effect could be extended from ground level up to several canopy heights. As a result, the Monin-Obukhov similarity theory (MOST) fails and an additional length scale is required to describe the flows. The key aim of this study is to introduce a simple wind profile model which accounts for the effect of the RSL in neutral ...
DescriptionSession AS2.2 - Turbulence in Atmospheric and Oceanic Boundary Layers: no. EGU2015-5064
Persistent Identifierhttp://hdl.handle.net/10722/217466
ISSN

 

DC FieldValueLanguage
dc.contributor.authorHo, YK-
dc.contributor.authorLiu, CH-
dc.date.accessioned2015-09-18T06:00:08Z-
dc.date.available2015-09-18T06:00:08Z-
dc.date.issued2015-
dc.identifier.citationThe 2015 General Assembly of the European Geosciences Union (EGU), Vienna, Austria, 12-17 April 2015. In Geophysical Research Abstracts, 2015, v. 17, no. EGU2015-5064-
dc.identifier.issn1607-7962-
dc.identifier.urihttp://hdl.handle.net/10722/217466-
dc.descriptionSession AS2.2 - Turbulence in Atmospheric and Oceanic Boundary Layers: no. EGU2015-5064-
dc.description.abstractThe atmospheric boundary layer (ABL) immediately above the urban canopy is the roughness sublayer (RSL). In this layer, flows and turbulence are strongly affected by the roughness elements beneath, e.g. building obstacles. The wind flows over urban areas could be represented by conventional logarithmic law of the wall (log-law) in the neutrally stratified ABL. However, in the RSL region, the vertical wind profile deviates from that predicted from log-law and the effect could be extended from ground level up to several canopy heights. As a result, the Monin-Obukhov similarity theory (MOST) fails and an additional length scale is required to describe the flows. The key aim of this study is to introduce a simple wind profile model which accounts for the effect of the RSL in neutral ...-
dc.languageeng-
dc.publisherCopernicus GmbH. The Journal's web site is located at http://www.geophysical-research-abstracts.net-
dc.relation.ispartofGeophysical Research Abstracts-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleAdjustment of roughness sublayer in turbulent flows over two-dimensional idealised roughness elements-
dc.typeConference_Paper-
dc.identifier.emailLiu, CH: chliu@hkucc.hku.hk-
dc.identifier.authorityLiu, CH=rp00152-
dc.description.naturepublished_or_final_version-
dc.identifier.hkuros251777-
dc.identifier.volume17-
dc.publisher.placeGermany-

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