A two-equation turbulence model and its application to a buoyant diffusion flame

Research output: Contribution to journalArticle


A modified k–ε two-equation turbulence model was developed to improve the consideration of the important buoyancy effect on turbulence and turbulent transport, which is a serious deficiency of the standard buoyancy-modified k–ε model. The present model was tested against both plane and axisymmetric thermal plumes and a buoyant diffusion flame. The model was found to be stable, computationally economic, promising and applicable to complex situations. The predicted plume spreading rates and velocity and temperature profiles agreed well with experimental measurements. When compared with the standard buoyancy-modified k–ε turbulence model, this model gives significantly improved numerical results.


  • Zhenghua Yan
  • Göran Holmstedt
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering
  • Building Technologies
Original languageEnglish
Pages (from-to)1305-1315
JournalInternational Journal of Heat and Mass Transfer
Issue number7
Publication statusPublished - 1999
Publication categoryResearch