|Document ID (ISN)||111351|
|Convention or series no.
||HSE Research Report RR629
||Tickle G.A., Carlisle J.E.
Health and Safety Executive
||Extension of the dense gas dispersion model DRIFT to include buoyant lift-off and buoyant rise
||HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 2WA, United Kingdom, 2008. viii, 74p. Illus. 63 ref.
||Report_RR629.pdf [in English]
||This report concerns the specification of equations extending the dense gas dispersion model DRIFT to include buoyant lift-off and rise. The lift-off modelling is based on that for a free buoyant cloud. Added mass terms are included in the model's vertical momentum equation since they offer the prospect of suppressing lift-off for wide clouds. The elevated continuous plume model is chosen to be similar to other published elevated plume models. The elevated instantaneous model is based on the puff model of Turner. The proposed model smoothly evolves between grounded and elevated phases. Passive spreading of the elevated cloud is based on a relative diffusion model. DRIFT's atmospheric profiles have been extended to above the surface layer and to include profiles of temperature and humidity.
||United Kingdom; air movement; gaseous effluents
||mathematical models; research; report
||E - Books, reports, proceedings
|Country / State or Province||United Kingdom|
||Toxic and dangerous substances
|Broad subject area(s)