Numerical analysis of intermediate species diffusion effect on low temperature oxidation in a homogeneous n-heptane mixture

Atsushi Teraji, Masashi Nishida, Takahiro Morikawa, Takashi Ishihara, Yukio Kaneda

Research output: Contribution to journalArticle


Two-dimensional direct numerical simulation (DNS) was applied to auto-ignition of n-heptane/air mixture. The diffusion of intermediate species was studied in terms of the influence on the ignition delay. The chemical reaction process. The simplified reaction mechanism was used in this study. Likewise, the influence of turbulence was investigated by comparing the results of 0 dimensional simulation and two-dimensional direct simulation of non-turbulence condition. In conclusions, the ignition delay was strongly affected by the different diffusion speeds of intermediate species. It was shown that the outflow of OH radical having larger diffusion coefficient decreases the reaction rate at the high temperature point. On the contrary, the reaction rate was enhanced by the influx of OH radical at the low temperature point.

Original languageEnglish
Pages (from-to)1592-1600
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number779
Publication statusPublished - Dec 1 2011
Externally publishedYes



  • Chemical reaction
  • Diffusion
  • Direct numerical simulation
  • Ignition
  • Low temperature oxidation
  • Turbulence
  • Turbulent mixing

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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