CORRECTION OF WIND-TUNNEL PRESSURE COEFFICIENTS FOR REYNOLDS-NUMBER EFFECT

Detailed measurements on a low-rise building made at full scale and on a wind-tunnel model show a significant Reynolds number effect associa ted with the separated flow region on the windward roof slope of the b uilding. Other possible causes for the observations are explored but a re systematically eliminated. Brief details of the experimental proced ure are presented together with significant results which suggest gene ralised corrections for scale effects. It is also proposed that the se nsitivity of the separated flow at the windward eaves to Reynolds numb er has a secondary effect on the flow pattern downstream. Further deta iled measurements are required to enable the correction factors to be generalised for other types of structure.