Wind tunnel investigations on models of low-rise buildings require simulation of flow properties present in the atmosphere and the Jensen number. The effects of Jensen number and Reynolds number on pressure coefficients and peak factors have been addressed by many investigators, particularly because full scale field experiments have shown higher peak pressure coefficients on various panels in comparison to their model counterparts. The study conducted and presented herein clearly shoes that the peak factors for the roof and wall panels on geometrically similar models and their corresponding prototype, namely, the Texas Tech Building, show a decreasing trend with increasing values of the parameter (bu{sub}(*l)v{sub}t), where u{sub}* is the shear friction velocity and v{sub}t is a modified value of conventional kinematic viscosity, v as discussed in the paper. With the available knowledge on the variation of mean and fluctuating pressures with Jensen number, and the variation of the peak factor with (hu{sub}*lv{sub}t) presented herein, it is now possible to predict the peak pressures in full scale conditions based on model tests conducted in the wind tunnel more realistically for roof regions experiencing separated shear flows normal to edges, and for wall regions.
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