著者

中林 功一 鬼頭 修己 加藤 義孝

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.61, no.589, pp.3122-3129, 1995-09-25

被引用文献数

4

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Mean velocity profiles of Couette・Poiseuille-type turbulent flow developed between fixed and moving walls have been measured. The relevant parameters for the wall, 1/2-power and core region are μ(=μ^3_*/αν, where α=1/ρ・dτ/dy) and Re^*'(=u_*h'/ν), β'(=αh'/u^2_*) and Re^*', and β(=αh/u^2_*) and Re^* (=u_*h/ν) respectively. The effects of these parameters on the velocity profiles in each region considered. Except for the core region of the Couette-type flow, each region has a reference wall. In the wall region, the wall law varies largely with μ but slightly with Re^*'. Typically, the additive constant B of the logarithmic-velocity low (or Van-Driest damping factor A^+) is shown to depend only on μ. The 1/2-power velocity law depends not only on β', as well known, but also Re^*' under low Re conditions. In the core region, the normalized eddy viscosity ε_T/u_*h' is constant irrespective of Re^* and β for Poiseuille-type flow while it depends on both Re^* and β for Couette-type flow. This indicates that the turbulent structures of the core region are quite different between Poiseuille-and Couette-type flows.