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Evolution of disturbance wavepackets in an oscillatory Stokes layer
journal contribution
posted on 2023-05-18, 15:52 authored by Thomas, C, Davies, C, Andrew BassomAndrew Bassom, Blennerhassett, PJNumerical simulation results are presented for the linear and nonlinear evolution of disturbances in a flat Stokes layer. The response to a spatially localised impulsive forcing is investigated and it is found that the spatial–temporal development of the flow displays an intriguing family-tree-like structure, which involves the birth of successive generations of distinct wavepacket components. It is shown that some features of this unexpected structure can be predicted using the results of a linear stability analysis based on Floquet theory.
History
Publication title
Journal of Fluid MechanicsVolume
752Pagination
543-571ISSN
0022-1120Department/School
School of Natural SciencesPublisher
Cambridge Univ PressPlace of publication
40 West 20Th St, New York, USA, Ny, 10011-4211Rights statement
Copyright Cambridge University Press 2014Repository Status
- Restricted