A Global Stability Analysis of the Wake behind a Rotating Circular Cylinder

MA Dong-Jun; SUN De-Jun; YIN Xie-Yuan

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A Global Stability Analysis of the Wake behind a Rotating Circular Cylinder

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@@ A new high resolution approach based on spectral element method is proposed to analyse the complex globalstability for the non-parallel flow passing a rotating and translating circular cylinder. The studies presented here predict the variation of Strouhal number St as the spin parameter α increases from 0.0 to 1.4, for the Reynolds number Re = 60. The direct numerical simulation shows a smallincrease of vortex shedding frequency at α＜ 1.1, and a slight decrease as α approaches the critical spin parameter α = 1.37. The trend of variation of eigen-frequency with α obtained bylinear stability analysis is opposite to those obtained by direct numerical simulation for Re = 60, although they achieve the same frequency at the onset of vortex shedding.

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《中国物理快报：英文版》 |2005年第8期|1964-1967|共4页
作者
MA Dong-Jun; SUN De-Jun; YIN Xie-Yuan;
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School of Engineering Science, University of Science and Technology of China, Hefei 230027;

School of Engineering Science, University of Science and Technology of China, Hefei 230027;

School of Engineering Science, University of Science and Technology of China, Hefei 230027;

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中图分类物理学;
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A Global Stability Analysis of the Wake behind a Rotating Circular Cylinder

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