Urban morphology as a passive strategy in promoting outdoor air quality
| Autor: | Osama Mahmoud Abo Eleinen, ashraf elmokadem, Asmaa M. Hassan, Naglaa A. Megahed |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Pollution
Pollutant media_common.quotation_subject Outdoor air quality 0211 other engineering and technologies Urban morphology Environmental engineering Context (language use) Natural ventilation 02 engineering and technology Building and Construction Indoor air quality Mechanics of Materials 021105 building & construction Architecture Environmental science 021108 energy Current (fluid) Safety Risk Reliability and Quality Civil and Structural Engineering media_common |
| Zdroj: | Journal of Building Engineering. 29:101204 |
| ISSN: | 2352-7102 |
| DOI: | 10.1016/j.jobe.2020.101204 |
| Popis: | Outdoor air quality represents one of the greatest problems facing the world, and influences the indoor environments of residential units, resulting in numerous health risks. Consequently, in addition to architects, planners must consider different urban strategies to limit the pollution risks from vehicular emissions using air pollutant dispersion in order to promote outdoor air quality. Therefore, urban morphology as a passive strategy has gradually reflected new challenge to promote air pollutants dispersion. In this context, this paper aims to investigate the effect of the urban morphology on promoting outdoor air quality at the Mubarak residential blocks in Port Said city. To this aim, four alternatives with various urban forms, and morphological indicators are proposed, and quantitatively assessed to investigate their influence on the dispersion of air pollutants using Ansys Fluent. A transient three-dimensional Computational Fluid Dynamics (CFD) analysis is performed with two specific inflow conditions to assess the performance of each alternative. The results confirmed that the integration of the urban form, and morphological indicators can affect the dispersion of air pollutants. In addition, vertical morphological indicators can dilute the concentrations of air pollutants more so than horizontal indicators over the same time sequence. The proposed alternatives reduced the concentrations of air pollutants by approximately 20–85% compared with the current case, hence promoting both outdoor, and indoor air quality. Such promoting enables residential units to utilize natural ventilation from roadside windows. Moreover, this study will help designers, and policymakers to regrade urban extended in the future from numerous alternatives. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect