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Coherent structure of a d-type rough wall boundary layer in a fully rough regime : analysis with the VITA technique

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 42 Issue 1 Page 1-6
published_at 1991-10
KJ00000156861.pdf
[fulltext] 459 KB
Title
完全粗面領域におけるd形粗面境界層の組織構造 : VITA法による解析
Coherent structure of a d-type rough wall boundary layer in a fully rough regime : analysis with the VITA technique
Creators Mochizuki Shinsuke
Creators Osaka Hideo
Source Identifiers
Coherent structure of a d-type rough wall boundary layer at a momentum thickness Reynolds number of R_θ≒5000 has been investigated experimentally. The conditional averaged signals and mean bursting frequency were obtained with the VITA technique. The results show that the bursting phenomenon does exist even in the present rough wall flow. However, the intensity of ejection process is smaller than that of the d-type rough wall flow at R_θ≒800. The mean bursting frequency non-dimensionalized with the wall units takes almost the same value both in the present flow and the smooth wall flow.
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1991-10
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部