Science and Education Publishing American Journal of Energy Research 2 4 2014 10 09 Impact of Shape of Obstacle Roof on the Turbulent Flow in a Wind Tunnel 90 98 EN Slah Driss Zied Driss Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax (ENIS), Univrsity of Sfax, TUNISIA Imen Kallel Kammoun AJER2014243 10.12691/ajer-2-4-3 2014 09 13 2014 10 08 2014 10 09 In this paper, we are interested in the impact of shape of obstacle roof on the turbulent flow in a wind tunnel. Particularly,arched, inclined, pitched and flat roofs obstacles are examined. A three-dimensional flow of a fluid is numerically analyzed using the Navier-Stokes equations in conjunction with the standard k-ε turbulence model. These equations were solved by a finite-volume discretization method. The comparison between our numerical and experimental results shows a good agreement and confirms the numerical method.