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Other TitleOrigin of oscillation leading to Karman's vortex street in the flow past a rectangular (circular) cylinder
Author(jpn)水島, 二郎; 武本, 幸生 
Author(eng)Mizushima, Jiro; Takemoto, Yukio
Author Affiliation(jpn)同志社大学理工学部機械システム工学科; SIMULIA Corp.
Author Affiliation(eng)Department of Mechanical Engineering, Graduate School of Engineering, Doshisha University; Dassault Systemes Simulia Corp.
Issue Date2010-02-26
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA special publication: Proceedings of the 43rd and 44th JAXA Workshops on "Investigation and Control of Boundar-Layer Transition"
宇宙航空研究開発機構特別資料: 「境界層遷移の解明と制御」研究会講演論文集(第43回・第44回)
Publication date2010-02-26
AbstractThe transition of the flow past a rectangular cylinder from a convectively unstable state to an absolutely unstable one is investigated numerically, in which a localized disturbance is added at a certain point in the flow, and the subsequent spatio-temporal development of the disturbance is observed. We evaluated the absolutely unstable region in the flow field in order to identify the origin of oscillation leading to Karman' vortex street. Our results suggest that the origin lies in the absolutely unstable region, whose spatial scale is proved to be consistent with those reported in previous papers.
DescriptionMeeting Information: 43rd JAXA Workshops on "Investigation and Control of Boundar-Layer Transition" (October 2-3, 2008) ; 44th JAXA Workshops on "Investigation and Control of Boundar-Layer Transition" (March 26-27, 2009)
会議: 第43回(2008年10月2日-10月3日)「境界層遷移の解明と制御」研究会; 第44回(2009年3月26日-3月27日)「境界層遷移の解明と制御」研究会
Keywordswake, rectangular cylinder, Karman vortex street, absolute instability, convective instability
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-09-014

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