スガ　カズヒコ   Kazuhiko Suga   須賀　一彦    所属   追手門学院大学  理工学部 機械工学科    職種   教授
言語種別	英語
発行・発表の年月	2020
形態種別	外国学会誌（その他）
査読	査読あり
標題	Spanwise measurements of turbulence structure over permeable walls
執筆形態	共著・編著（代表編著を除く）
掲載誌名	ETC 2013 - 14th European Turbulence Conference
掲載区分	国外
出版社・発行元	CAMBRIDGE UNIV PRESS
巻・号・頁	822,pp.186-201
担当区分	最終著者
著者・共著者	Yuka Nakagawa,Masayuki Kaneda,Kazuhiko Suga
概要	Copyright © ETC 2013 - 14th European Turbulence Conference.All rights reserved. In order to understand the effects of the wall permeability on turbulence near permeable walls, spanwise flow field measurements are carried out for turbulent flows in channels with permeable bottom walls by a two-component particle velocimetry (PIV) system. The porous media used are three kinds of foamed ceramics which have almost the same porosity (∼ 0.8) but different permeability. The turbulent flow fields in the spanwise planes are discussed using instantaneous and statistical measurement data. At a small permeability Re (ReK), low speed and high speed regions, which form a similar streaky structure to that of solid-wall turbulence, are observed. In case of a large ReK, although some large scale striped patterns are observed, they are confirmed to be different from those of the solid wall turbulence structure.
DOI	10.1017/jfm.2017.278
ISSN	0022-1120/1469-7645
Put Code(ORCID)	33437117
PermalinkURL	http://orcid.org/0000-0001-9313-1816