Analysis of Wind Behavior in Openings by CFD, in order to Enhance Natural Ventilation in Residential Buildings Design of Moderate and Humid Climate (Case of Study: City of Gorgan)
Today, increasing environmental pollution due to the use of fossil fuels to provide thermal comfort is one of the problems of this area. The amount of these contaminants in residential buildings are more tangible. By referring to the traditional architecture, it can be seen that natural ventilation was provided by using natural forces (in this article: wind). Therefore, it can be concluded that the proper use of effective elements on natural ventilation can solve the problems created by air conditioning in new buildings. This article was identified different models of locating of openings in buildings (city of Gorgan) and analyzed the wind behavior in each of these models in terms of natural ventilation and finally, the optimal model for natural ventilation was selected. In this article, qualitative research methodology to identify and study the methods of using wind in vernacular habitats was used firstly. Then by CFD modeling and choosing selected models in terms of location of openings in order to improve the natural ventilation, Wind behavior analysis in these models was performed by the simulation research method (Gambit 2.4.6 software for making model geometry and creating grid mesh and ANSYS FLUENT 15 for wind behavior analysis). As a result of analyzes, models that had northeastern-southwest direction, more openings in the southwest elevation and the suction window in the opposite direction were selected as the optimal model for residential buildings in city of Gorgan.
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