Study on wall model for LES based on coherent structures in turbulence
| Project/Area Number |
20760119
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Keio University |
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Principal Investigator |
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| Project Period (FY) |
2008 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 流体 / 計算物理 / 流体工学 / 数値流体力学 / 乱流モデル / LES / コヒーレント構造 |
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| Research Abstract |
In LES of turbulence simulation, investigated were the statistical properties of a coherent structure function, which shows an eddy structure and is a normalized second invariant of velocity gradient tensor. It was found that for turbulent channel flows as well as homogeneous isotropic turbulence, the average, the variance, and pdf of the function are independent of Reynolds number, depend on the distance from a wall, and is available as a variable for a wall model.
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Report
(3 results)
Research Products
(13 results)
