A unified criterion for the convective extinction of fuel particles

Xinping Wu, C. K. Law, A. C. Fernandez-Pello

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The extinction criterion for the buoyancy-generated stagnation point boundary layer flow of a burning fuel particle is derived using large activation energy asymptotics. An extinction factor which depends on the flame sheet solution is numerically determined, hence allowing direct evaluation of the criterion. Together with the existing extinction criteria for the forced flow stagnation point boundary layer and the convection-free spherically symmetric case, they provide limits on the susceptibility of extinction when subjected to convection of different nature and intensity. Their functional dependence on the various system parameters are also examined from a unified viewpoint. Trends exhibited by the criteria agree well with existing experimental data.

Original languageEnglish (US)
Pages (from-to)113-124
Number of pages12
JournalCombustion and Flame
Issue number1-3
StatePublished - Jan 1982
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • General Physics and Astronomy


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