JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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title実在流体の流れに及ぼす粘性の影響: 渦輪および回転円柱の場合
Other TitleThe effect of viscosity on the flow of real fluids: The cases of vortex rings and of a rotating cylinder
Author(jpn)松井, 辰彌
Author(eng)Matsui, Tatsuya
Issue Date2009-02-27
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA special publication: Proceedings of the 41st and 42nd 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41回・第42回)
Publication date2009-02-27
AbstractFor some time it was believed that in a pair of vortex rings successively ejected in a real fluid, the second one could not pass through the first one due to viscosity. But it was due to the smallness of Reynolds number, not to the viscosity, that the passing-through was unsuccessful. Next, in a uniform flow passing a rotating circular cylinder, viscous effects appear in the boundary layer of the cylinder and in the wake of the cylinder. In the boundary layer, vortices of the same kind as Taylor vortices could be observed. In the flow outside the boundary layer near the front stagnation point, longitudinal vortices of the same type as Gortler vortices were observed depending on the curvature of streamlines. The periodicity in the direction of the cylinder axis in Karman vortex street in the wake is due to the Taylor vortices left in the separated boundary layer.
Description会議: 第42回「境界層遷移の解明と制御」研究会(2008年3月31日-4月1日)
Keywordsvortex ring, boundary layer, wake, Taylor vortex, Karman vortex street, Gortler vortex
Document TypeTechnical Report
JAXA Category特別資料
Report NoJAXA-SP-08-006

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