Abstract
Structures and tall buildings in urban environment have been considered responsible factors for generating turbulence and reducing velocity of the wind flow. Thus, the decisions about positioning the wind turbines in urban areas require several factors to consider. Literature review reflects that the wind flow diverting and accelerating characteristics of existing obstacles are less attended. In the present study, wind velocity variations taking place in the exterior local environment of porous and non-porous obstacles (except over the obstacle) are analyzed. To analyze the resulting wind flow characteristics, the simulations have been carried out using ANSYS Fluent, CFD code. The results reflect that optimum velocity magnitude can be achieved in the diverted paths at left and right sides of the obstacles.