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 language | English |
|---|---|
| Pages (from-to) | 3003-3010 |
| Number of pages | 8 |
| Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 58 |
| Issue number | 554 |
| DOIs | |
| Publication status | Published - Jan 1 1992 |
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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 journal › Article
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TY - JOUR
T1 - An Improved k-ε Model for Prediction of Turbulent Flows with Separation and Reattachment
AU - Abe, Ken-Ichi
AU - Nagano, Yasutaka
AU - Kondoh, Tsuguo
PY - 1992/1/1
Y1 - 1992/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85010673758&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85010673758&partnerID=8YFLogxK
U2 - 10.1299/kikaib.58.3003
DO - 10.1299/kikaib.58.3003
M3 - Article
VL - 58
SP - 3003
EP - 3010
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 554
ER -