Investigation of eddy diffusivity in a reactive plane jet by using direct numerical simulation

Tomoaki Watanabe, Yasuhiko Sakai, Kouji Nagata, Osamu Terashima, Yasumasa Ito, Hiroki Suzuki, Toshiyuki Hayase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Eddy diffusivity in a planar turbulent jet with a second-order chemical reaction (A+B→R) is investigated by using direct numerical simulation. Reactant A and B are premixed into the jet flow and the main flow, respectively. The eddy diffusivity of species A on the jet centerline is calculated from the mean concentration of species A and the streamwise turbulent mass flux of the species A. The results show that the chemical reaction makes the eddy diffusivity of species A small, and the effects of the chemical reaction on the eddy diffusivity depend on the Damköhler number. From these results, we can conclude that the gradient diffusion model should be used with considerations of the effects of chemical reactions on eddy diffusivity.

Original languageEnglish
Title of host publicationAsiaSim 2012 - Asia Simulation Conference 2012, Proceedings
Number of pages7
EditionPART 1
Publication statusPublished - 2012
Externally publishedYes
EventAsia Simulation Conference, AsiaSim 2012 - Shanghai, China
Duration: Oct 27 2012Oct 30 2012

Publication series

NameCommunications in Computer and Information Science
NumberPART 1
Volume323 CCIS
ISSN (Print)1865-0929


ConferenceAsia Simulation Conference, AsiaSim 2012


  • Chemical Reaction
  • Direct Numerical Simulation
  • Eddy Diffusivity
  • Turbulent Flow

ASJC Scopus subject areas

  • General Computer Science
  • General Mathematics


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