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Abstract
A numerical investigation is presented for multicomponent droplet evaporation under high-temperature laminar convective conditions. The study improves an existing model that did not account for the temperature dependence of liquid-phase densities and heat capacities. The new model, which accounts for variable gas and liquid-phase thermophysical properties, has also resolved previously reported numerical problems encountered during the early stages of the simulations. Detailed data on the temporal and spatial variation of the liquid-phase concentration fields throughout the lifetime of a bicomponent droplet provide new insight on the liquid mass-transport mechanisms within typical vaporizing hydrocarbon droplets. The current simulations indicate that the variation of liquid densities with temperature must be taken into account for an accurate representation of the transport processes in droplet convective vaporization. On the contrary, the effect of the variation of liquid heat capacities with temperature proves to be rather minor.
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