نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکترای مهندسی مکانیک دانشگاه کاشان
2 استادیار دانشکده مهندسی مکانیک دانشگاه تفرش
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Evaluation of the indoor and outdoor flow of the building is one of the most effective ways to take advantage from the potential of natural ventilation. One of the effective parameters on this is the size of openings that are located on the walls of buildings. In this paper, by using 3D steady Reynolds-averaged Navier-Stokes (RANS) equations with SST k-ω turbulence model, the impact of this important parameter has been investigated. For this purpose, models with different aspect ratios and the same cross-sectional area have been applied in the entrance section of the building. The highest and lowest ventilation rate in the building is achieved in the model with an aspect ratio of 1.56 and 0.39, respectively. In order to evaluate the effect of the wind angle on the ventilation rate, the wind angle range from 0 to 75° has been investigated. The analysis of the results shows that the ventilation rate at wind angles more than 30° is independent of the entrance dimensions. Also, by increasing the entrance height, the high-speed zones in the building interior are reduced and the stagnation and low speed zones are increased. Also, investigation of pressure parameter in the outside area of building in different models shows that in the front of the windward wall, the pressure changes remarkably are more than the leeward wall of the building.
کلیدواژهها [English]
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