The linear impulse response for disturbances in an oscillatory stokes layer

Christopher Davies, Christian Thomas, Andrew P. Bassom, Peter J. Blennerhassett

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review

1 Citation (Scopus)

Abstract

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 publicationIUTAM_ABCM Symposium on Laminar Turbulent Transition
Place of PublicationAmsterdam Netherlands
PublisherElsevier
Pages381-384
Number of pages4
Volume14
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventIUTAM-ABCM Symposium on Laminar Turbulent Transition 2014 - Pestana Rio Atlântica, Rio de Janeiro, Brazil
Duration: 8 Sep 201412 Sep 2014
Conference number: 8th
http://www.ndf.poli.usp.br/SLTT2014/index.html
http://toc.proceedings.com/26997webtoc.pdf

Publication series

NameProcedia IUTAM
PublisherElsevier BV
Volume14
ISSN (Electronic)2210-9838

Conference

ConferenceIUTAM-ABCM Symposium on Laminar Turbulent Transition 2014
Abbreviated titleLTT 2014
CountryBrazil
CityRio de Janeiro
Period8/09/1412/09/14
Internet address

Keywords

  • boundary layer
  • Floquet stability
  • impulse response
  • Unsteady flow
  • wavepacket evolution
  • The linear impulse response for disturbances in an oscillatory stokes layer

    Davies, C., Thomas, C., Bassom, A. P. & Blennerhassett, P. J., 2013, Proceedings of the International Conference of Numerical Analysis and Applied Mathematics 2013. Simos, T., Psihoyios, G. & Tsitouras, C. (eds.). Melville NY USA: AIP Publishing, p. 269-272 4 p. (AIP Conference Proceedings; vol. 1558, no. 1).

    Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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