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	2005/12
形態種別	外国学術誌（その他）
査読	査読あり
標題	Simultaneous measurement of turbulent velocity field and surface wave amplitude in the initial stage of an open-channel flow by PIV
執筆形態	共著・編著（代表編著を除く）
掲載誌名	EXPERIMENTS IN FLUIDS
掲載区分	国外
出版社・発行元	SPRINGER
巻・号・頁	39(6),pp.945-953
担当区分	最終著者
著者・共著者	FC Li,Y Kawaguchi,T Segawa,K Suga
概要	Particle image velocimetry (PIV) was employed to measure the two components of the turbulent velocity field in the initial stage of an open-channel flow in a streamwise-wall-normal plane, and the free-surface level was discriminated from the PIV image. The details of this technique was described and demonstrated by showing the instantaneous velocity field together with the free-surface shape, statistics of velocity field, and the wave-turbulence interaction terms. Preliminary experimental results showed that the turbulence intensity of the streamwise velocity fluctuations (u') decreased, whereas that of the wall-normal velocity (v') increased near the bottom wall with downstream distance in the initial stage of an open-channel flow; (ug) over bar (g is the fluctuation of free-surface level) had a negative value, (vg) over bar had a positive value near the free surface, and the surface-wave-affected depth deepened with downstream distance.
DOI	10.1007/s00348-005-0995-3
ISSN	0723-4864
Put Code(ORCID)	41807914
PermalinkURL	http://www.scopus.com/inward/record.url?eid=2-s2.0-28044471202&partnerID=MN8TOARS
researchmap用URL	http://orcid.org/0000-0001-9313-1816