Abstract
Numerical 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.
Original language | English |
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Pages (from-to) | 543-571 |
Number of pages | 29 |
Journal | Journal of Fluid Mechanics |
Volume | 752 |
DOIs | |
Publication status | Published - 10 Aug 2014 |
Externally published | Yes |
Keywords
- boundary layer stability
- Key words absolute/convective instability
- transition to turbulence