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    题名: Stability of a pair of counterrotating and corotating vortices of different strengths
    作者: 戴璽恆;Dai, Albert;Garía, Marcelo H.;ASCE, M.
    贡献者: 淡江大學水資源與環境工程學系
    关键词: Vortices;Stability;Rotation;Linear analysis
    日期: 2009-06
    上传时间: 2010-08-09 20:39:38 (UTC+8)
    出版者: American Society of Civil Engineers (ASCE)
    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.
    關聯: Journal of Engineering Mechanics 135(6), pp.591-595
    DOI: 10.1061/(ASCE)EM.1943-7889.0000006
    显示于类别:[水資源及環境工程學系暨研究所] 期刊論文


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