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	2009
形態種別	外国学会誌（First author）
査読	査読あり
標題	An experimental study on turbulence over rib-mounted permeable walls
執筆形態	共著・編著（代表編著を除く）
掲載誌名	TURBULENCE, HEAT AND MASS TRANSFER 6
掲載区分	国外
出版社・発行元	BEGELL HOUSE, INC
巻・号・頁	pp.271-274
担当区分	筆頭著者,責任著者
著者・共著者	K. Suga,S. Tominaga,M. Kaneda
概要	To discuss and understand the turbulence separation over porous permeable materials, two velocity components of the turbulent fields over rib-mounted porous walls are measured by PIV. A solid (impermeable) or a porous (permeable) square cylinder rib whose hight is a half of the channel height is mounted on the porous bottom wall of fully developed channel flows. The measured bulk flow Reynolds number ranges 10(3) <= Re-b <= 10(4). The results indicate that a turbulent recirculation or wake flow region is formed behind the rib. In the solid-rib cases, a turbulent separation bubble formed behind the rib becomes smaller at turbulent inflow conditions since more part of the entraining fluid is supplied through the permeable bottom wall.