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DA Silva, F. G.; DEL CARLO, U.; Saraiva, J. A. G. The wind as a true design tool in urban planning. In: INTERNATIONAL CONFERENCE ON PASSIVE AND LOW ENERGY ARCHITETURE, 18., 2001, Florianópolis. Anais... Florianópolis, 2001. p. 229-234.
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Abstract

Passive techniques are the only way to increase comfort outdoors. Solutions like shadowing, green areas or water ponds and fountains (in dry climates) are usually referred together with natural ventilation though most authors express the impossibility of assessing wind conditions since wind, they claim, is random in nature and furthermore is impossible to model flow inside a built up area. The authors have shown that this is not true. Not only wind conditions can be assessed for any place and characterised in statistical and time basis but it is possible through simplified numerical models to built wind atlas for other points, up to 20 to 30 km around, taking into account topographic and ground roughness (namely urbanisation) characteristics. Then using a very limited series of tests over a physical model in a wind tunnel wind conditions in specific urban areas (either built or under planning) can be assessed and an analysis of outdoor conditions as arriving from wind action performed. The methodology is presented in the paper with a case of application (namely João Pessoa, PB) and it is also shown that a by-product of it is the knowledge of wind potential to promote natural ventilation inside houses.
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