EVALUATION OF THE USE OF THE NUMERICAL K-EPSILON MODEL KAMELEON-II, FOR PREDICTING WIND PRESSURES ON BUILDING SURFACES

This paper evaluates the reliability of the numerical K-epsilon model, Kameleon II, for determining wind pressures on building surfaces, by comparing computed results to wind-tunnel tests and full-scale measure ments. Computed values of pressure on a cube indicate higher values th an those obtained by wind-tunnel tests. The values obtained for pressu res on a house closely matched wind-tunnel results for the walls where as the roof C-p values were underestimated by Kameleon II. In separati on zones, care should be taken using numerically obtained C-p values a s changes in the boundary conditions affect the flow considerably.