カメタニ　ユキノリ   KAMETANI YUKINORI   亀谷　幸憲    所属   明治大学  理工学部    職種   専任講師
言語種別	英語
発行・発表の年月	2015
形態種別	学術雑誌
査読	査読あり
標題	Direct numerical simulation of a turbulent mixing layer with a transversely oscillated inflow
執筆形態	共著(筆頭者)
掲載誌名	JOURNAL OF FLUID SCIENCE AND TECHNOLOGY
掲載区分	国内
出版社・発行元	JAPAN SOC MECHANICAL ENGINEERS
巻・号・頁	10(1)
著者・共著者	◎Yukinori Kametani, Masayuki Kawagoe, Koji Fukagata
概要	Direct numerical simulation of a turbulent mixing layer with a transversely oscillated inflow is performed. In order to compare the results with the experimental study of Naka et al. (2010), the angular frequency of the oscillation was set to be 0.83 and 3.85 (referred to as Case A and Case B, respectively). From the three-dimensional visualization, large-scale spanwise vortical structures are clearly observed in the controlled cases. In both cases, the Reynolds normal stresses are increased in the region right downstream of the forcing point due to the periodic forcing. The spatial development of the turbulent energy thickness and the Reynolds shear stress thickness show that the Reynolds shear stress in Case B is decreased by the control despite the increase of the turbulent kinetic energy. From the spectral analysis, large-scale spanwise structures are found to be caused by the periodic forcing, while the spectra of the spanwise velocity fluctuations are nearly unchanged.
DOI	10.1299/jfst.2015jfst0004
ISSN	1880-5558