ON VARIABLE-PROPERTY, BLOWING, AND TRANSIENT EFFECTS IN CONVECTIVE DROPLET EVAPORATION WITH INTERNAL CIRCULATION

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Abstract
The life history of an n-heptane droplet introduced into an environment of its own vapour (800 К, 1 atm), with an initial Reynolds number of 100, has been studied using a finite volume based numerical technique. All effects due to variable thermophysical properties, liquid phase motion and heating, and transient variations in droplet size and velocity were included in the analysis. Variations in thermophysical properties were found to reduce both heat transfer and drag substantially. Blowing due to vaporization was also found to reduce heat transfer but to have a limited effect on total drag. Quasi-steady correlations are shown to predict the total drag and heat transfer rates accurately provided that liquid phase heating is accounted for through the use of an effective heat of vaporization.

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