The Regeneration of Quasi-Streamwise Vortices in the Near-Wall Region
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概要
- 論文の詳細を見る
Regeneration of quasi-streamwise vortices is investigated using a data base obtained by high-resolution LES(Large Eddy Simulation)for channel flow. It has been revealed that quasi-streamwise vortices are regenerated both at the upstream of the upstream end of a parent vortex and at the downstream end of a parent vortex. In both cases, the new vortex has a vorticity of opposite sign to that of the parent vortex and comprises a chain line of vortices in the flow direction with the parent vortex, which is one of the basic organized structures in the near-wall region. It has also been revealed that the main contribution to the generation of new vortices at their infant stage is the tilting of wall-normal vortices, and that to their sustenance at grown-up stage is stretching effect.
- 一般社団法人日本機械学会の論文
- 1997-05-15
著者
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MORIKAWA Takeshi
Department of Wood Engineering, Forestry and Forest Products Research Institute
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MIYAKE Yutaka
Department of Mechanical Engineering, Osaka University
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Miyake Yutaka
Department Of Mechanical Engineering Osaka University
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Morikawa Takeshi
Department Of Mechanical Engineering Osaka University
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USHIRO Ryusuke
Takenaka Corporation
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