AN INVESTIGATION OF THE FLOW OF WIND OVER A GROUP OF IDENTICAL PITCHED – ROOF BUILDING MODELS

Mofreh M. Nassief

Abstract


A wind-tunnel study and a numerical simulation were carried out on a group of four models representing identical pitched-roof buildings of low rise and aspect ratio=1. The simulation was carried out under the FLUENT Computational Fluid Dynamics (CFD) software package environment in which the boundary layer and the standard k- є turbulence model are considered .The computed pressure coefficients were validated with results obtained for a 1:10 model in a wind tunnel . The effects of Reynolds number for wind directions of 0o and 90o and a roof angle of 45o on pressure coefficient were investigated. The results indicate that the drag coefficient, hence the wind force, attains its highest value at 86% and 98% of building height for the upwind and downwind models, respectively. The results were compared with some experimentally-obtained wind tunnel results, showing fair- to- good agreements. The present study represents a contribution to the state of knowledge on the flow in the considered domain.

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