NUMERICAL SIMULATION OF TURBULENT SHEAR FLOW OVER TWO-DIMENSIONAL SMOOTH TOPOGRAPHY USING UNSTEADY RANS METHOD
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- MIYASHITA Koichi
- Wind Engineering Institute
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- NAKAYAMA Akihiko
- Graduate School of Science and Technology, Kobe University
Bibliographic Information
- Other Title
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- 非定常RANSによる二次元地形上気流の数値シミュレーション
- ヒテイジョウ RANS ニ ヨル 2ジゲン チケイ ジョウキリュウ ノ スウチ シミュレーション
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Abstract
A new method of simulating turbulent flows is proposed, which works like an LES method when the grid size is small enough to resolve time-dependent large eddies and reduces to a conventional Reynolds-avenged Navier-Stokes equation method when the grid size becomes large. The transition is achieved by introducing the switch-over function applied to the eddy viscosity coefficient that is determined by a method similar to existing two-equation models. The method has been applied to flows over smooth topography with or without flow separation. The results give detailed time-accurate flow field that have not been possible by a conventional unsteady RANS techniques and the time-averaged results agree well with experimental results
Journal
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- Journal of Structural and Construction Engineering (Transactions of AIJ)
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Journal of Structural and Construction Engineering (Transactions of AIJ) 66 (541), 79-85, 2001
Architectural Institute of Japan
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Details 詳細情報について
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- CRID
- 1390001205638540928
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- NII Article ID
- 110004303991
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- NII Book ID
- AN10438559
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- ISSN
- 18818153
- 13404202
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- NDL BIB ID
- 5718347
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed