Simulation of a diffusion flame in turbulent mixing layer by the flame hole dynamics model with level-set method

J. Kim, S. Chung, K. Ahn, J. Kim

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9 Scopus citations


The partial quenching structure of diffusion flames, arising from the phenomenon of turbulent flame lift off, is investigated in a turbulent mixing layer by the method of flame hole dynamics. Modification of the flame hole dynamics by including the level-set method is specifically aimed to properly take into account the effect of slow flame-edge response near the crossover scalar dissipation rate at which the edge propagation speed vanishes. Simulating the flame hole dynamics with the level-set method results in two major improvements. The first improvement is observed in stabilizing lifted turbulent diffusion flames. The three necessary conditions for lifted stabilization are proposed and numerically tested to show that rapid variation of the edge propagation speed near the crossover scalar dissipation rate helps lifted stabilization. Secondly, an improvement in the statistical properties of the stationary turbulence reacting state is observed in that (1) the lift-off height is found to be higher because of the streamwise flow pushing the turbulent edge front to the downstream direction and (2) the partial burning probability, conditioned with the scalar dissipation rate, exhibits a realistic smooth transition across the crossover scalar dissipation rate.

Original languageEnglish (US)
Pages (from-to)219-240
Number of pages22
JournalCombustion Theory and Modelling
Issue number2
StatePublished - Apr 2006

Bibliographical note

Funding Information:
The present study was financially supported by the Carbon Dioxide Reduction and Sequestration R&D Center, a 21st Century Frontier Research Center funded by the Korean Ministry of Science and Technology. The authors also would like to express their appreciation for the use of computing system of the KISTI Supercomputing Center under The Strategic Supercomputing Support Program with Dr Sang Min Lee as Technical Supporter.


  • Flame edge
  • Flame hole dynamics
  • Level set method
  • Lifted stabilization

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Modeling and Simulation
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

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