Some aspects of the behaviour in wind of large grouped chimneys

Large reinforced concrete chimneys are commonly associated with Reynolds Numbers of the order 10⁷ or higher. These values are three orders of magnitude greater than those typical of tests in boundary layer wind tunnels and an order of magnitude or more greater than that attainable in large sub-sonic tunnels such as that at Monash. If controlled wind tunnel tests cannot match the Reynolds Numbers and these large values of R(e) remain beyond the …