On the Mean Flow Structure of a d-Type Rough Wall Turbulent Boundary Layer : Low Reynolds Number Effect
Bibliographic Information
- Other Title
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- d形粗面乱流境界層の平均流構造に関する研究 : レイノルズ数の影響
- d ガタ ソメン ランリュウ キョウカイソウ ノ ヘイキン リュウコウゾウ ニ カンスル ケンキュウ レイノルズスウ ノ エイキョウ
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Abstract
The Low Reynolds number effect on the mean flow structure of a d-type rough wall boundary layer were investigated experimentally under the zero pressure gradient. The local skin-friction coefficient and mean velocity profile were obtained in the Reynolds number range, R_θ=700-5140. The scaling laws for the mean flow structure were studied with the friction velocity obtained by the direct skin-friction measurement. It is found that the logarithmic layer with the same value of the Karman constant as the smooth wall flow, κ=0.41,does exist in the present low Reynolds number range. A detailed analysis of the outerlayer velocity profile with the law of the wake shows that both the development of wake parameter and the profile of wake function differ from those of the smooth wall boundary layer.
Journal
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- 山口大学工学部研究報告
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山口大学工学部研究報告 43 (1), 1-6, 1992-10
山口大学工学部
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Keywords
Details 詳細情報について
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- CRID
- 1050564287405346688
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- NII Article ID
- 110000216903
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- NII Book ID
- AN00244228
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- ISSN
- 03727661
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- NDL BIB ID
- 3804205
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- Text Lang
- ja
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- Article Type
- departmental bulletin paper
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- Data Source
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- IRDB
- NDL
- CiNii Articles