2024-03-29T07:41:47Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00007415
2023-01-16T03:52:44Z
320:321:322
平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性 (第3報, 対数法則領域における整構造の役割)
Invariant Assumption of PDF Profile and Universal Velocity Law in Turbulent Boundary Layer (3rd Report, Contribution from Coherent Structures to Log-law Profile)
辻, 義之
TSUJI, Yoshiyuki
宮地, 圭
MIYACHI, Kei
鈴木, 孝裕
SUZUKI, Takahiro
中村, 育雄
NAKAMURA, Ikuo
open access
日本機械学会
本文データは学協会の許諾に基づきCiNiiから複製したものである。
Turbulent Boundary Layer
Log-law Region
Coherent Structure
Probability Density Function
In a zero-pressure gradient turbulent boundary layer, the multi-point measurement by 24 ch I-probes is performed. The relation between coherent structures and logarithmic velocity profile is studied by way of proper orthogonal decomposition technique and the stochastic estimation. It is found that the existence of coherent structures are necessary condition for the universal velocity profile, however it is not enough. Small-scale motions are also necessary to realize the log-law profile. The probability density profile in the overlap region is studied, and as a result, the invariant assumption of PDF in relation to the coherent structure is obtained. It was also evaluated how the velocity fluctuation in the log-region is affected by the coherent structures.
日本機械学会
2004-07
jpn
journal article
VoR
http://hdl.handle.net/2237/9097
https://nagoya.repo.nii.ac.jp/records/7415
http://ci.nii.ac.jp/naid/110004999515/
0387-5016
日本機械学會論文集 B編
70
695
1679
1686
https://nagoya.repo.nii.ac.jp/record/7415/files/JsMecEngB_70-695-1679.pdf
application/pdf
930.8 kB
2018-02-19