Development of the Isotropic Eddy Viscosity Type SGS Models for the Dynamic Procedure Using Finite Difference Method and its Assessment on a Plane Turbulent Channel Flow
-
- TSUBOKURA Makoto
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
-
- KOBAYASHI Toshio
- Institute of Industrial Science, the University of Tokyo
-
- TANIGUCHI Nobuyuki
- Information Technology Center, the University of Tokyo
この論文をさがす
抄録
Recent researches on the dynamic Smagorinsky’s model of Germano et al. in the context of using finite difference method (FDM) on a turbulent channel flow have revealed the serious overestimation of mean velocity and streamwise turbulent intensity. The objective of our research here is to develop an isotropic eddy viscosity model that mitigates this problem, as an alternative to Smagorinsky’s model. The procedure proposed by Yoshizawa et al. was utilized and a more consistent eddy viscosity model for the dynamic procedure was obtained. The proposed model was tested in plane turbulent channel flows at Reτ=180 and 590 normalized by the friction velocity and the channel half-width, and predicted better statistics than Smagorinsky’s model. The new model was also found to be less sensitive to a discrete filtering operation than Smagorinsky’s. The organized structures near the wall were also investigated and it was found that the overestimation of the eddy structures reproduced by Smagorinsky’s model is clearly improved by the proposed model.
収録刊行物
-
- JSME International Journal Series B Fluids and Thermal Engineering
-
JSME International Journal Series B Fluids and Thermal Engineering 44 (4), 487-496, 2001
一般社団法人 日本機械学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390001204676539904
-
- NII論文ID
- 110003474276
-
- NII書誌ID
- AA10888815
-
- ISSN
- 13475371
- 13408054
-
- NDL書誌ID
- 5978479
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可