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

Ken-Ichi Abe, Y. Nagano, T. Kondoh

Research output: Contribution to journalArticle

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 - Jan 1 1993
Externally publishedYes

Fingerprint

Reynolds number
Turbulence models
Turbulent flow
Friction

All Science Journal Classification (ASJC) codes

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

Cite this

Numerical prediction of separating and reattaching flows with a modified low-Reynolds-number k-ε{lunate} model. / Abe, Ken-Ichi; Nagano, Y.; Kondoh, T.

In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 46-47, No. C, 01.01.1993, p. 85-94.

Research output: Contribution to journalArticle

@article{3f52735171b4459a8de032cd1245c3e9,
title = "Numerical prediction of separating and reattaching flows with a modified low-Reynolds-number k-ε{lunate} model",
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.",
author = "Ken-Ichi Abe and Y. Nagano and T. Kondoh",
year = "1993",
month = "1",
day = "1",
doi = "10.1016/0167-6105(93)90117-7",
language = "English",
volume = "46-47",
pages = "85--94",
journal = "Journal of Industrial Aerodynamics",
issn = "0167-6105",
publisher = "Elsevier",
number = "C",

}

TY - JOUR

T1 - Numerical prediction of separating and reattaching flows with a modified low-Reynolds-number k-ε{lunate} model

AU - Abe, Ken-Ichi

AU - Nagano, Y.

AU - Kondoh, T.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0027643258&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027643258&partnerID=8YFLogxK

U2 - 10.1016/0167-6105(93)90117-7

DO - 10.1016/0167-6105(93)90117-7

M3 - Article

AN - SCOPUS:0027643258

VL - 46-47

SP - 85

EP - 94

JO - Journal of Industrial Aerodynamics

JF - Journal of Industrial Aerodynamics

SN - 0167-6105

IS - C

ER -