Quantitative analysis and assessment of a technogenic risk imply a thorough study of the emergency process at the level of phenomenology. In such of a study, mathematical models of the physical and chemical processes of the hazardous substance formation in the surrounding space are involved. The occurrence and influence of the damaging factors on recipients, such as people, the environment, buildings and equipment, must be assessed. One of the most common scenarios for the formation of a hazardous substance in the environment is spillage of a liquid phase, often of a multicomponent composition, onto the earth's surface. The subsequent evaporation of a hazardous substance is a key factor in the formation of an explosive, flammable or toxic cloud. Therefore, it is extremely important to correctly assess the intensity of the hazardous substance release into the environment. This study presents a mathematical model for the evaporation of a multicomponent liquid from the surface of an emergency spill. It considers various energy influxes that affect the evaporation process (atmospheric air heat, underlying surface heat, radiation from the sun). The effect of cooling due to evaporation is taken into account. The developed model considers the influence of the liquid phase composition on the evaporation process. A comparative analysis of the simulation results was made using the published experimental data on the mixture of a cryogenic liquid (nitrogen) and liquids under non-boiling conditions such as ethanol and cyclohexane evaporation process. The results of the comparison showed the model’s applicability in the field of quantitative risk analysis and assessment. The possibilities of improving the multicomponent liquid pool evaporation mathematical model are presented
Received 18.05.2022
Revised 04.10.2022
Accepted 28.11.2022
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