Comparison Between Data from the Heavy Gas Dispersion Experiments at Thorney Island and Predictions of Simple Models
Box models are simple, practical tools for doing heavy gas dispersion calculations. They are used widely in the formulation of safety cases and policy guidelines . It is important that models used for these purposes should be properly tested. It is not sufficient merely to fix values of phenomenological constants and show agreement with experiment superficially, but necessary to establish the correctness of the physical2 content of the model in order that it may be validly extrapolated . This is the purpose of the study presented here.
KeywordsRichardson Number Velocity Scale Entrainment Velocity Cloud Height Turbulence Velocity Scale
Unable to display preview. Download preview PDF.
- 2.C. J Wheatley and D M Webber, Aspects of the dispersion of denser-than-air vapours relevant to gas cloud explosions, CEC Report, Luxembourg, EUR 9592 en (1984).Google Scholar
- 3.J McQuaid (ed), Proceedings of the Symposium on Heavy Gas Dispersion Trials at Thorney Island, Sheffield University, April 3–5, 1984, to be published in J. Haz. Mat. (1985).Google Scholar
- 4.P W M Brighton, Area-averaged concentrations, height-scales and mass balances, in: Ref 3.Google Scholar
- 5.P W M Brighton, A J Prince and D M Webber, Determination of cloud area and path from visual and concentration records, in: Ref 3.Google Scholar
- 7.LS Fryer and G D Kaiser, DENZ — a computer program for the calculation of the dispersion of dense toxic or explosive gases in the atmosphere, UKAEA Report, SRD R152 (1979).Google Scholar
- 8.DM Webber, The physics of heavy gas cloud dispersal, UKAEA Report, SRD R243 (1983).Google Scholar