Coupled hydrodynamic and diffusional-thermal instabilities in flame propagation at subunity Lewis numbers

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

The dynamics of flame cell evolution due to the coupling between hydrodynamic and diffusional-thermal instabilities in subunity Lewis number flames was simulated using a sixth-order central difference scheme and newly developed nonreflective boundary conditions. Results show that the interaction between these two modes of instabilities yields distinct evolutions of cell splitting, merging, growth, local extinction, and lateral motion, leading to fluctuations of the flow and species concentrations as well as substantial increase in the flame speed. The study also demonstrates that small computational domains cannot correctly predict cell merging and transverse motion.

Original languageEnglish (US)
Article number074106
Pages (from-to)1-10
Number of pages10
JournalPhysics of Fluids
Volume17
Issue number7
DOIs
StatePublished - Jul 2005

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Fingerprint Dive into the research topics of 'Coupled hydrodynamic and diffusional-thermal instabilities in flame propagation at subunity Lewis numbers'. Together they form a unique fingerprint.

  • Cite this