流体工学部門講演会講演論文集
Online ISSN : 2424-2896
セッションID: 0113
会議情報
0113 シェルピンスキー四面体後流に生成する乱流統計量の空間分布測定(OS1 噴流,後流および剥離流れ現象の探求と技術革新,オーガナイズドセッション)
加藤 勇樹牛島 達夫鈴木 博貴長谷川 豊
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会議録・要旨集 フリー

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Turbulence generated through the Sierpinski tetrahedra was investigated. The Sierpinski tetrahedron is a model of foliage distribution of crown tree, and fractal dimesion of both strucures is two. Velocity ditribution in the cross section corresponds to the arrangement of the smallest tetraheda. Skewness of velocity fluctuation is positive in the lower speed region and vice versa, while flatness lies between 2.8 and 3.0 across the section. Taylor microscale based Reynolds number obtained was much greater than the corresponding grid generated turbulence. And the inertial subrange was observed.
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© 2012 一般社団法人 日本機械学会
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