教師資料查詢 | 類別: 期刊論文 | 教師: 戴璽恆 DAI, HSI-HENG (瀏覽個人網頁)

標題:Stability of a pair of counterrotating and corotating vortices of different strengths
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出版(發表)日期2009/06/01
作品名稱Stability of a pair of counterrotating and corotating vortices of different strengths
作品名稱(其他語言)
著者戴璽恆; Dai, Albert; Garía, Marcelo H.; ASCE, M.
單位淡江大學水資源與環境工程學系
出版者American Society of Civil Engineers (ASCE)
著錄名稱、卷期、頁數Journal of Engineering Mechanics 135(6), pp.591-595
摘要The stability of a pair of line vortices is considered. The two line vortices are different in strength of circulation and can be counter- or corotating. This work is a generalization reported by Crow in 1970 and Jimenez in 1975. We find that the most unstable wave number and the maximum growth rate of instability are influenced by the circulation difference between the vortices for a pair of counterrotating vortices. For a pair of corotating vortices, we find that their stability properties are not significantly influenced by their circulation difference. Although the physically most-amplified wave number is not apparent based on linear stability analysis, a pair of corotating vortices is unstable irrespective of the circulation difference.
關鍵字Vortices; Stability; Rotation; Linear analysis
語言英文
ISSN0733-9399
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收錄於SCI
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