The Linear Impulse Response for Disturbances in an Oscillatory Stokes Layer

C. Davies, C. Thomas, Andrew Bassom, P.J. Blennerhassett

    Research output: Chapter in Book/Conference paperConference paperpeer-review

    1 Citation (Scopus)


    © 2015 The Authors. A 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.
    Original languageEnglish
    Title of host publicationProcedia IUTAM
    ISBN (Print)2210-9838
    Publication statusPublished - 2015
    EventIUTAM_ABCM Symposium on Laminar Turbulent Transition - Rio di Janeiro, Brazil
    Duration: 8 Sep 201412 Sep 2014
    Conference number: 8


    ConferenceIUTAM_ABCM Symposium on Laminar Turbulent Transition
    CityRio di Janeiro


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