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

Ken-Ichi Abe, Yasutaka Nagano, Tsuguo Kondoh

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3003-3010
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume58
Issue number554
DOIs
Publication statusPublished - Jan 1 1992

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turbulent flow
Turbulent flow
attachment
low Reynolds number
Reynolds number
predictions
backward facing steps
diffusers
turbulence models
Pressure gradient
Turbulence models
pressure gradients
friction
dissipation
energy dissipation
Friction

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

An Improved k-ε Model for Prediction of Turbulent Flows with Separation and Reattachment. / Abe, Ken-Ichi; Nagano, Yasutaka; Kondoh, Tsuguo.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 58, No. 554, 01.01.1992, p. 3003-3010.

Research output: Contribution to journalArticle

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