Numerical prediction of separating and reattaching flows with a modified low-Reynolds-number k-ϵ model

K. Abe, Y. Nagano, T. Kondoh

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6 Citations (Scopus)

Abstract

We propose a new turbulence model which is modified from the low-Reynolds-number k-ε{lunate} model developed by Nagano and Tagawa. The main improvement is made by the introduction of the Kolmogorov velocity scale uε{lunate} ≡ (νε{lunate}) 1 4 instead of the friction velocity uτ. We have also reevaluated the model constants in the transport equations. With these modifications, it is shown that the present model predicts quite successfully the separating and reattaching turbulent flows downstream of a backward-facing step at various Reynolds numbers, which have been very difficult to simulate with any previous k-ε{lunate} model.

Original languageEnglish
Pages (from-to)85-94
Number of pages10
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume46-47
Issue numberC
DOIs
Publication statusPublished - Aug 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Mechanical Engineering

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