LES and RNG turbulence modeling in DI diesel engines

Ossi Kaario, Heikki Pokela, Lars Kjäldman, Jukka Tiainen, Martti Larmi

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

8 Citations (Scopus)


The one-equation subgrid scale model for the Large Eddy Simulation (LES) turbulence model has been compared to the popular k-ε RNG turbulence model in very different sized direct injection diesel engines. The cylinder diameters of these engines range between 111 and 200 mm. This has been an initial attempt to study the effect of LES in diesel engines without any modification to the combustion model being used in its Reynolds-averaged Navier-Stokes (RANS) form. Despite some deficiencies in the current LES model being used, it already gave much more structured flow field with approximately the same kind of accuracy in the cylinder pressure predictions than the k-ε RNG turbulence model.
Original languageEnglish
Number of pages9
JournalSAE Technical Paper Series
Issue number2003-01-1069
Publication statusPublished - 2003
MoE publication typeA4 Article in a conference publication
EventSAE World Congress and Exhibition 2003 : Computer-Aided Engineering of Vehicle and Engine Systems and Components - Detroit, United States
Duration: 3 Mar 20036 Mar 2003


  • turbulence modeling
  • LES
  • RNG
  • diesel engines, combustion
  • emissions

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