An Improved k-ε Model for Prediction of Turbulent Flows with Separation and Reattachment

Ken Ichi Abe, Yasutaka Nagano, Tsuguo Kondoh

研究成果: Contribution to journalArticle査読

56 被引用数 (Scopus)

抄録

We propose a new turbulence model which is modified from the low-Reynolds-number k-ε model developed by Nagano and Tagawa. The main improvement is made by the introduction of the Kolmogorov velocity scale, uε = (uε)1/4, instead of the friction velocity uτ, to account for the near-wall and low-Reynolds-number effects. We have also reevaluated the model constants in the transport equations of the turbulent energy and its dissipation rate. With these modifications, it is shown that the present model predicts quite successfully a diffuser flow with a strong adverse pressure gradient and the separating and reattaching flows downstream of a backward-facing step.

本文言語英語
ページ(範囲)3003-3010
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
58
554
DOI
出版ステータス出版済み - 1992
外部発表はい

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 機械工学

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