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    Wind Flow Analysis on Simple Plan-Shaped Buildings
    (Yildiz Technical Univ, Fac Architecture, 2021) Inan Gunaydin, Tugba
    Understanding the wind effects on the building is of great importance in the architectural field. The present study focuses on the analyse of various simple plan shaped buildings with different aspect ratios under various wind velocity to examine wind pressure distributions, and velocity distributions on and around the building. Therefore, the main evaluation criteria are plan shapes, building aspect ratios, storey height and wind velocity. With this aim, ANSYS Fluent 20.0 Computational Fluid Dynamics (CFD) software package program is used for the analysis. As a result of the study, it has been observed that the aspect ratios of width/height ratios (WR) and length/height (LR) ratios, building plan shape and wind velocity significantly affect the wind characteristics of the building. It has been observed that the change in the plan geometry did not have a significant effect on pressure coefficients on leeward surface. However, the change on the plan shape or variation in the aspect ratios have critical effects in the pressure coefficients on side surfaces. As the length of the building increased, the pressure values increased on the side surfaces. On the other hand, it has been noticed that building aspect ratios have significant impacts on pressure values. The most critical pressure values were observed on windward surface and on side surfaces in D4 model which has the greatest length ratio (L/H) of 6.0.
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    Wind flow on and around U-shaped buildings
    (Emerald Group Publishing Ltd, 2022) Inan Gunaydin, Tugba
    Purpose This paper presents the numerical examination of wind pressure distributions on U-plan shaped buildings having four different depth ratios (DR) as 0.5, 1, 2 and 4 over wind incidence angle (WIA) of 0 degrees. The purpose of this study is to investigate the effect of irregular building form, DRs, distances from the reentrant corner, wind velocity values on and around wind pressure distributions of the buildings. With this aim, ANSYS Fluent 20.0 Computational Fluid Dynamics (CFD) program is used for the analysis. Design/methodology/approach Four U-shaped buildings having the same height, width and wing length but having different DR in plan were analyzed by the application of CFD package of ANSYS 20. With this purpose, wind pressure distributions on and around U-plan shaped buildings were analyzed for the wind velocity values of 2 and 5 m/s over WIA of 0 degrees. Comprehensive results were obtained from the analyses. Findings While the change in the DR values did not create a significant change in positive pressure coefficients on A and E surfaces, negative pressure values increased as the DR decreased. The negative pressure coefficients observed on the A and E surfaces become higher than the positive pressure coefficients with the decrease in the DR. On contrary to that condition, with the decrease in the DR, G surfaces take higher positive pressure coefficients than the negative pressure coefficients. The reason for this is that the DR decreases and negative pressure values on G surface significantly decrease. The effect of the DR on the pressure coefficients is remarkable on B and D surfaces. The negative pressure coefficients on the B and D surfaces tend to increase as the DR decreases. Research limitations/implications This study focused on DRs and wind velocity values effect on pressure coefficients to limit variables. Different building wing dimensions did not take into account. Originality/value Although there are a number of studies related to wind behavior of irregular plan shaped buildings, irregular building forms have not been extensively investigated parametrically, especially in terms of the effect of DR on wind pressures. This study is therefore designed to fill this gap by analyzing impacts of various parameters like building shape with various DRs, WIA and wind velocity values on wind pressure distributions and velocity distributions on and around the building.