Effect of urban morphology on wind condition in idealized city models
2009 (English)In: Atmospheric Environment, ISSN 1352-2310, Vol. 43, no 4, 869-878 p.Article in journal (Refereed) Published
Wind conditions in urban environments are important for a number Of reasons. They can serve to out of the urban environment and to moderate urban microclimatic conditions if transport air Pollutants 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 OF 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 Found 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, Crown.
Place, publisher, year, edition, pages
2009. Vol. 43, no 4, 869-878 p.
Wind conditions, Urban morphology, City form, Numerical simulation, Wind tunnel
Other Environmental Engineering Civil Engineering
IdentifiersURN: urn:nbn:se:kth:diva-32359DOI: 10.1016/j.atmosenv.2008.10.040ISI: 000263188100014ScopusID: 2-s2.0-57949105455OAI: oai:DiVA.org:kth-32359DiVA: diva2:410239
QC 201104122011-04-132011-04-132011-04-13Bibliographically approved