Transition waves and nonlinear interactions in the near wake of a circular cylinder
Transition waves and interactions between two kinds of instability-vortex shedding and transition wave in the near wake of a circular cylinder in the Reynolds number range 3 000-10 000 are studied by a domain decomposition hybrid numerical method.Based on high resolution power spectral analyses for...
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| Veröffentlicht in: | Science China. Mathematics 1997-08, Vol.40 (8), p.849-859 |
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| container_title | Science China. Mathematics |
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| creator | 凌国灿 Allen T.Chwang 牛家玉 王冬(女菱) |
| description | Transition waves and interactions between two kinds of instability-vortex shedding and transition wave in the near wake of a circular cylinder in the Reynolds number range 3 000-10 000 are studied by a domain decomposition hybrid numerical method.Based on high resolution power spectral analyses for velocity new results on the Reynolds-number dependence of the transition wave frequency,i.e.ft/fa~Re0.87 are obtained.The new predictions are in good agreement with the experimental results of Wei and Smith but different from Braza’s prediction and some early experimental results ft/fa-Re0.5 given by Bloor et al.The multi-interactions between two kinds of vortex are clearly visualized numerically.The strong nonlinear interactions between the two independent frequencies (ft,fa) leading to spectra broadening to form the coupling mfs±nft are predicted and analyzed numerically,and the characteristics of the transition are described.Longitudinal variations of the transition wave and its coupling are reported.Deta |
| doi_str_mv | 10.1007/BF02878925 |
| format | Article |
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| ispartof | Science China. Mathematics, 1997-08, Vol.40 (8), p.849-859 |
| issn | 1674-7283 1006-9283 1869-1862 1862-2763 |
| language | eng |
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| source | Springer Nature - Complete Springer Journals; Alma/SFX Local Collection |
| subjects | circular Circular cylinders cylinder Domain decomposition methods Fluid flow interaction near nonlinear Numerical methods Reynolds number transition Vortex shedding wake wave |
| title | Transition waves and nonlinear interactions in the near wake of a circular cylinder |
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