Computational Fluid Dynamics of Wind Pressure Distribution on Some Special Structures

Abstract

Computational Fluid Dynamic, CFD, is extremely assigned to simulate and find a solution for numerous wind-tunnel simulation testes by computerizing simulation. The CFD technique has been used to evaluate pressure values with its coefficients for curved surface such as domes, shells and buildings surfaces. The most current provisions for calculating the wind induced pressure on buildings extracted from boundary layer wind-tunnel tests. The wind-tunnel experiments are expensive and not always available for design engineers. This research is an attempt to maximize the benefit of using the available CFD Turbulence Models to extend the available database for wind codes provisions. A commercial code program called FLUENT has been used to predict the pressure coefficients and wind flows on buildings. The available wind-tunnel results in literatures are compared with the results of the calibrated CFD model for some structures. Various CFD Turbulence Models in predicting airflow and mean pressure coefficient values on cube building have been used and evaluated. These models include RANS “Reynolds-Averaged Navier-Stokes” turbulence models, LES “Large-Eddy Simulation” and DES “Detached-Eddy Simulation” models. The results of the mean and distribution of the contours of pressure coefficients (Cp) for various CFD Turbulence are determined using these different turbulence models. A comparative study between the output results and resulting records of wind-tunnel test and the assigned values at code standard are given.