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Effect of urban morphology on wind condition in idealized city models
Department of Mechanical Engineering, TheUniversity of Hong Kong, Hong Kong SAR, Hong Kong.
University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för inomhusmiljö.
University of Hong Kong, Hong Kong SAR, Hong Kong.
2009 (English)In: Atmospheric Environment, ISSN 1352-2310, E-ISSN 1873-2844, Vol. 43, no 4, 869-878 p.Article in journal (Refereed) Published
Abstract [en]

Wind conditions in urban environments are important for a number of reasons. They can serve to transport air pollutants out of the urban environment and to moderate urban microclimatic conditions if satisfactory, yet can compromise pedestrian comfort and safety if not. We aim to study experimentally and numerically the effects of urban morphology (e.g., overall city form (skyline), street orientation, and street configuration) on wind conditions in cities. This report considers our initial investigations of two idealized city forms that are coincidentally similar to ancient Roman cities that were organized on one or two primary streets - a main north-south street, the cardus maximus, and a secondary east-west street, the decumanus maximus - and contained within a well-defined perimeter. We first consider round and square city models with one main street set parallel to the approaching wind and a secondary street producing an intersection at city centre. Not surprisingly, wind conditions in the two city models are dissimilar due to their shape differences. We then consider a long rectangular city model with a fully developed steady flow region along the main street. If the main street of the round city model is narrow, the parallel approaching wind cannot blow through the entire street and a penetrating inflow exists at the leeward opening. For the round city model with two crossing streets, a slightly non-parallel wind to the main street generates a stronger wind level in the entire street volume.

Place, publisher, year, edition, pages
2009. Vol. 43, no 4, 869-878 p.
Keyword [en]
City form; Numerical simulation; Urban morphology; Wind conditions; Wind tunnel
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:hig:diva-6484DOI: 10.1016/j.atmosenv.2008.10.040ISI: 000263188100014Scopus ID: 2-s2.0-57949105455OAI: oai:DiVA.org:hig-6484DiVA: diva2:302103
Available from: 2010-03-05 Created: 2010-03-04 Last updated: 2016-10-27Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf