On the topological bifurcation of flows around a rotating circular cylinder |
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Authors: | Hu Guohui Sun Dejun Yin Xieyuan |
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Institution: | (1) Department of Modern Mechanics, University of Science and Technology of China, 230026 Hefei, Anhui, China;(2) LNM, Institute of Mechanics, Academia Sinica, 100080 Beijing, China |
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Abstract: | Flow fields around a rotating circular cylinder in a uniform stream are computed using a low dimensional Galerkin method.
Reslts show that the formation of a Fopple vortex pair behind a stationary circular cylinder is caused by the structural instability
in the vicinity of the saddle located at the rear of the cylinder. For rotating cylinder a bifurcation diagram with the consideration
of two parameters, Reynolds numberRe and rotation parameter α, is built by a kinematic analysis of the steady flow fields.
The project supported by the National Natural Science Foundation of China |
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Keywords: | topological bifurcation Galerkin method circular cylinder |
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