Document Type : Original Article
Authors
1
Assistant Professor, Department of Architecture, University of Guilan, Rasht. Iran
2
Master of Urban Planning, Apadana Institute of Higher Education, Shiraz, Iran
3
PhD Researcher in Urban Planning, Faculty of Art and Architecture, Shiraz University, Shiraz, Iran
4
Associate Professor of Architecture Department, Faculty of Art and Architecture, Shiraz University, Shiraz, Iran
5
Assistant Professor, Department of Architecture, Faculty of Art and Architecture, Shiraz University, Shiraz, Iran
10.22124/upk.2025.28792.1980
Abstract
With the development of cities in the present era, problems and phenomena such as urban heat islands, reduction of air quality in the fabric of cities and lack of thermal comfort in the public spaces of cities have created deep challenges for the lives of citizens. On the other hand, in architectural and urban studies, few studies have addressed the characteristics of the form and shape of cities in order to increase natural ventilation in streets as public spaces with high traffic in mega cities. Considering the density and height of buildings in the wall of an urban street in the middle of Shiraz metropolis, this study evaluates possible models to increase natural ventilation and as a result reduce the heat of the urban environment and better exit pollutants. The research method is quantitative and the simulation tool of fluid dynamics calculations is used to model the wind flow in the urban environment. Based on this, the FloEFD software was included in this study after validation, and after modeling in the internal environment of the software, the three components of temperature, pressure, air flow speed, and air flow movement pattern were examined between the created models. The results of the study show that the second model, which is considered with a gradual increase in the number of floors from the street wall to the fabric, has a more suitable air distribution and air flow speed than the other investigated models. Based on the numerical results, the flow speed in this model has increased up to 2.2 m/s. In connection with the air flow pattern in the optimal model, the flow is more intense and dispersed in all the points of the studied texture and street, which can lead to a better exit of heat and pollutants from the street environment.
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