381 Davies.pdf (1.31 MB)
The linear impulse response for disturbances in an oscillatory Stokes layer
conference contribution
posted on 2023-05-23, 10:43 authored by Davies, C, Thomas, C, Andrew BassomAndrew Bassom, Blennerhassett, PJA brief review is given of numerical simulation results for the evolution of disturbances in a flat oscillatory Stokes layer. A spatially localised form of impulsive forcing is applied to trigger the disturbances. For the linearized case, the disturbance development displays an intriguing family tree-like structure, which involves the birth of successive generations of wavepackets. Although some features of the wavepacket behaviour may be accounted for using a Floquet linear stability analysis, for Fourier modes with prescribed wavenumbers, the discovery of the tree-like structure was completely unexpected. Simulation results were also obtained for nonlinear disturbances, where highly localised spikes were found to develop.
History
Publication title
Procedia IUTAM 14: ABCM Symposium on Laminar Turbulent TransitionVolume
14Editors
MAF Medeiros, JR MeneghiniPagination
381-384ISSN
2210-9838Department/School
School of Natural SciencesPublisher
Elsevier BVPlace of publication
NetherlandsEvent title
IUTAM-ABCM Symposium on Laminar Turbulent TransitionEvent Venue
Rio de Janeiro, BrazilDate of Event (Start Date)
2014-09-08Date of Event (End Date)
2014-09-12Rights statement
Copyright 2015 The Authors CC BY-NC-NDRepository Status
- Open