Effects of gravity and ambient pressure on liquid fuel droplet evaporation

George Gogos, Siang Soh, Daniel N. Pope

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


An axisymmetric numerical model has been developed to conduct a study of single droplet evaporation over a wide range of ambient pressures both under normal and microgravity conditions. Results for droplet lifetime as a function of ambient pressure and initial droplet diameter are presented. The enhancement in the droplet evaporation rate due to natural convection is predicted. This enhancement becomes more dominant with increasing ambient pressure due to the increase in the Grashof number. The higher the ambient pressure, the closer the Grashof number remains to its initial value throughout most of the droplet lifetime because of the droplet swelling and the heat-up of the droplet interior. Results should be particularly of interest to researchers conducting experiments on droplet evaporation at elevated pressures within a normal gravity environment. The model developed is in good agreement with experimental data at low pressures. Explanations have been provided for its deviation at high pressures.

Original languageEnglish (US)
Pages (from-to)283-296
Number of pages14
JournalInternational Journal of Heat and Mass Transfer
Issue number2
StatePublished - Jan 2003

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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