2000 Fiscal Year Final Research Report Summary
Numerical model of turbulent flows with large vorticies and its applicatio
| Project/Area Number |
11650527
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水工水理学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
HOSODA Takashi Kyoto Univ., Civil Eng., Assoc.Pref., 工学研究科, 助教授 (10165558)
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| Co-Investigator(Kenkyū-buntansha) |
ONITSUKA Koki Kyoto Univ., Civil Eng., Res.Assoc., 工学研究科, 助手 (20293904)
NAGATA Nobuhisa Kyoto Univ., Civil Eng., Res.Assoc., 工学研究科, 助手 (50273462)
KIMURA Ichiro Yokkaich Univ., Env.Inf.Eng., Assoc.Prof., 環境情報学部, 講師 (60225026)
IWATA Michiaki Construction Tech.Inst., River Section, Chief Engineer, 技師
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| Project Period (FY) |
1999 – 2000
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| Keywords | CFD / Turbulence Model / RANS / River Sedimentation / Environmental Hydraunics / RANS |
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| Research Abstract |
Numerical model with a turbulence model was investigated to predict large vortices in turbulent flows. Non-linear k- ε model was considered as a fundamental model, and some necessary conditions based on the realizability conditions were derived for fundamental flow patterns with a singular point. Then, a model was applied to various flows observed in rivers and lakes such as horizontal vortices in compound open channel flows, flow around a river structure, etc. The model is also applied to the river channel processes and local scouring around a river structure.
It was pointed out through the examination of calculated results that the model can be applicable to various practical flow problems with large vortices induced by hydrodynamic instability, though further investigations are required to refine the model performance of 3-D flow structures around a large vortex.
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