Three-dimensional Floquet stability analysis of the wake of a circular cylinder
UNSPECIFIED. (1996) Three-dimensional Floquet stability analysis of the wake of a circular cylinder. JOURNAL OF FLUID MECHANICS, 322 . pp. 215-241. ISSN 0022-1120Full text not available from this repository.
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|
|Subjects:||T Technology > TJ Mechanical engineering and machinery
Q Science > QC Physics
|Journal or Publication Title:||JOURNAL OF FLUID MECHANICS|
|Publisher:||CAMBRIDGE UNIV PRESS|
|Official Date:||10 September 1996|
|Number of Pages:||27|
|Page Range:||pp. 215-241|
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