Some effects due to variations in turbulence integral length scales on the pressure distribution on wind-tunnel models of low-rise buildings

The work described here consists of results from wind-tunnel tests on models of the Building Research Establishment's experimental building at Aylesbury. The use of several scale models of this building in uniform and in simulated atmospheric boundary-layer flows together with the results from the full-scale experiments allowed an assessment of the effect of variations in the ratio of the longitudinal-turbulence integral length scale to body dimension (L_x/D). This confirmed that the values of L_x/D have to be modelled correctly even in a non-homogeneous, non-isotropic turbulent flow in order to obtain model results that are representative of the full-scale situation. The present results also appear to confirm explanations given for similar results for homogeneous, isotropic turbulent flows.