Investigation for the One-Equation-Type Subgrid Model with Eddy-Viscosity Expression Including the Shear-Damping Effect.
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The model expression for the subgrid-scale(SGS)Reynolds stress and the transport equation of the SGS energy are theoretically derived using a two-scale direct-interaction approximation(TSDIA). Applying the model to three-type flows, i.e.a homogeneous decaying turbulence, a mixing layer and a channel flow, the model constants are optimized and the results are compared with those of the Smagorinsky model in detail. Consequently, it is found that this one-equation model has two deficiencies. One is that the model-constants are dependent on flow fields like the Smagorinsky model. The other is that an exact asymptotic-behavior of the SGS energy in the vicinity of the wall is not satisfied by this one-equation model. Therefore, for the purpose of improving the near-wall profiles for the SGS quantities in this model, a new model for the SGS dissipation rate is suggested on the basis of a low-Reynolds-nomber Κ-ε model. Moreover, using the model including a high-order term of the SGS Reynolds stress, a new one-equation model which is applicable to several flows with fixed model-constants is proposed.
収録刊行物
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- JSME International Journal Series B Fluids and Thermal Engineering
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JSME International Journal Series B Fluids and Thermal Engineering 42 (2), 154-161, 1999
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001204671730688
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- NII論文ID
- 130004003742
- 110003474420
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- NII書誌ID
- AA10888815
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- BIBCODE
- 1999JSMEB..42..154O
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- COI
- 1:CAS:528:DyaK1MXlvVKqu7s%3D
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- ISSN
- 13475371
- 13408054
- http://id.crossref.org/issn/13408054
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- NDL書誌ID
- 4727888
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
