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Streamwise Vortical Structure associated with the Bursting Phenomenon in a d-Type Rough Wall Boundary Layer : Conditional averaged velocity signals and velocity vector plots

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 41 Issue 1 Page 1-8
published_at 1990-10
KJ00000156813.pdf
[fulltext] 522 KB
Title
d 形粗面境界層におけるバースト現象と関連した縦渦構造 : 集合平均波形とベクトル線図
Streamwise Vortical Structure associated with the Bursting Phenomenon in a d-Type Rough Wall Boundary Layer : Conditional averaged velocity signals and velocity vector plots
Creators Mochizuki Shinsuke
Creators Osaka Hideo
Source Identifiers
Three-dimensional spatial structure associated with the bursting phenomenon in a d-type rough wall turbulent boundary layer was investigated with the VITA tecnique. The conditional averaged signals of the three velocity components and the Reynolds shear stress were obtained at 28 locations in the cross stream section. These time dependent data were used to draw velocity vector plots in physical coordinate of x-y and x-z planes. The ejection process is associated with a pair of stremwise vortical motion which spanwise scale is about 50 viscous wall units. The Reynolds shear stress is mainly produced at the symmetrical plane of the vortical motion, z^+=0. While the sweep process is associated with large-scale vortical structure which is characterized by intense spanwise component.
Subjects
機械工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1990-10
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部