KAMETANI YUKINORI
Department Undergraduate School , School of Science and Technology Position Senior Assistant Professor |
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Language | English |
Publication Date | 2015 |
Type | Academic Journal |
Peer Review | Peer reviewed |
Title | Direct numerical simulation of a turbulent mixing layer with a transversely oscillated inflow |
Contribution Type | Co-authored (first author) |
Journal | JOURNAL OF FLUID SCIENCE AND TECHNOLOGY |
Journal Type | Japan |
Publisher | JAPAN SOC MECHANICAL ENGINEERS |
Volume, Issue, Page | 10(1) |
Author and coauthor | ◎Yukinori Kametani, Masayuki Kawagoe, Koji Fukagata |
Details | 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 |