On the Mean Flow Structure of a d-Type Rough Wall Turbulent Boundary Layer : Low Reynolds Number Effect
Memoirs of the Faculty of Engineering, Yamaguchi University Volume 43 Issue 1
Page 1-6
published_at 1992-10
Title
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
On the Mean Flow Structure of a d-Type Rough Wall Turbulent Boundary Layer : Low Reynolds Number Effect
Source Identifiers
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.
Languages
jpn
Resource Type
departmental bulletin paper
Publishers
山口大学工学部
Date Issued
1992-10
File Version
Version of Record
Access Rights
open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools
工学部