Wind-tunnel simulation of field dispersion tests (by the U.K. health and safety executive) of water-spray curtains

Field trials of water-spray curtain tests performed by the (British) Health and Safety Executive and designated by HSE-41 and -46 were modelled at a scale ratio of 1:28.9 in an atmospheric boundary-layer wind tunnel. The tests confirmed that dense clouds of carbon dioxide gas were significantly diluted by additional air entrained by the water curtain. Linear and logarithmic scatter diagrams of concentrations measured at equivalent scale points produced correlations of 0.87 and 0.97, respectively. Results confirm the use of Froude number modelling of both the dense gas cloud and water-spray droplet fluid dynamics.