Two approaches to modelling the heating of evaporating droplets have been widely used in engineering applications. In the first approach the heat rate supplied to the droplets to raise their temperatures, View the MathML source, is derived from the requirement that droplet evaporation rates, inferred from steady-state equations for mass and heat balance, should be the same. The second approach is based on the direct calculation of the distribution of temperature inside droplets assuming that their thermal conductivity is not infinitely large. The implications of these two approaches are compared for the case of stationary droplets in conditions relevant to Diesel engines. It is pointed out that although the trends of time evolution of View the MathML source predicted by both approaches are similar, actual values of View the MathML source predicted by these approaches can be visibly different. This difference can lead to noticeable differences in predicted droplet surface temperatures, radii and evaporation times. Possible reasons for these differences are discussed.
|Number of pages||4|
|Journal||International Communications in Heat and Mass Transfer|
|Early online date||13 Aug 2014|
|Publication status||Published - Oct 2014|
Bibliographical note“NOTICE: this is the author’s version of a work that was accepted for publication in International Communications in Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Communications in Heat and Mass Transfer, [57, October 2014)] DOI: 10.1016/j.icheatmasstransfer.2014.08.004.
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- Droplet evaporation
- Droplet heating
- Heat/mass transfer