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	2011/06
形態種別	外国学術誌（First author）
査読	査読あり
標題	Vortex structure of turbulence over permeable walls
執筆形態	共著・編著（代表編著を除く）
掲載誌名	INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
掲載区分	国外
出版社・発行元	ELSEVIER SCIENCE INC
巻・号・頁	32(3),pp.586-595
担当区分	筆頭著者,責任著者
著者・共著者	K. Suga,M. Mori,M. Kaneda
概要	In order to understand the effect of the wall permeability on the turbulent vortex structure near porous walls, based on PIV experimental data, a probability density analysis of fluctuating velocities, statistical quadrant and quadrant-hole analyses of the Reynolds shear stress are performed. The investigated flow fields are turbulent channel flows whose bottom walls are made of porous media. The porous media used are three kinds of foamed ceramics which have almost the same porosity (similar to 0.8) but different permeability. From the discussions on those analyses, a conceptual scenario of the development of the vortex structure near a permeable wall is proposed for a moderate permeability Reynolds number case. It explains the reason why the near-wall long streaky structure tends to vanish near a porous wall with increasing wall permeability. (C) 2011 Elsevier Inc. All rights reserved.
DOI	10.1016/j.ijheatfluidflow.2011.02.016
ISSN	0142-727X
Put Code(ORCID)	41807911
PermalinkURL	http://www.scopus.com/inward/record.url?eid=2-s2.0-79955720550&partnerID=MN8TOARS
researchmap用URL	http://orcid.org/0000-0001-9313-1816