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Three-dimensional Floquet stability analysis of the wake of a circular cylinder
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UNSPECIFIED (1996) Three-dimensional Floquet stability analysis of the wake of a circular cylinder. JOURNAL OF FLUID MECHANICS, 322 . pp. 215-241. ISSN 0022-1120.
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Abstract
Results are reported from a highly accurate, global numerical stability analysis of the periodic wake of a circular cylinder for Reynolds numbers between 140 and 300. The analysis shows that the two-dimensional wake becomes (absolutely) linearly unstable to three-dimensional perturbations at a critical Reynolds number of 188.5 +/- 1.0. The critical spanwise wavelength is 3.96 +/- 0.02 diameters and the critical Floquet mode corresponds to a 'Mode A' instability. At Reynolds number 259 the two-dimensional wake becomes linearly unstable to a second branch of modes with wavelength 0.822 diameters at onset. Stability spectra and corresponding neutral stability curves are presented for Reynolds numbers up to 300.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TJ Mechanical engineering and machinery Q Science > QC Physics |
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Journal or Publication Title: | JOURNAL OF FLUID MECHANICS | ||||
Publisher: | CAMBRIDGE UNIV PRESS | ||||
ISSN: | 0022-1120 | ||||
Official Date: | 10 September 1996 | ||||
Dates: |
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Volume: | 322 | ||||
Number of Pages: | 27 | ||||
Page Range: | pp. 215-241 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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