Comparison of Models for Aerosol Vaporisation in the Dispersion of Heavy Clouds

The dispersion of heavier-than-air aerosol clouds is of great relevance to the analysis and assessment of hazards in the chemical and petrochemical industries. There are many simple mathematical models for heavy gas dispersion, but two-phase dynamics are either ignored or treated in a very simple way, without any convincing scientific justification. In fact essentially all of those models which do treat two-phase phenomena rely on the “homogeneous equilibrium” assumption, whether they be for jet dispersion, for gravity dominated dispersion, or for any other aspect of a two-phase release.