Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/101661
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dc.contributor.authorSkote, M.en
dc.contributor.authorHaritonidis, J. H.en
dc.contributor.authorHenningson, D. S.en
dc.date.accessioned2014-01-28T03:16:29Zen
dc.date.accessioned2019-12-06T20:42:27Z-
dc.date.available2014-01-28T03:16:29Zen
dc.date.available2019-12-06T20:42:27Z-
dc.date.copyright2002en
dc.date.issued2002en
dc.identifier.citationSkote, M., Haritonidis, J. H., & Henningson, D. S. (2002). Varicose instabilities in turbulent boundary layers. Physics of fluids, 14(7), 2309-2323.en
dc.identifier.urihttps://hdl.handle.net/10356/101661-
dc.description.abstractAn investigation of a model of turbulence generation in the wall region of a turbulent boundary layer is made through direct numerical simulations. The model is based on the varicose instability of a streak. First, a laminar boundary layer disturbed by a continuous blowing through a slot is simulated in order to reproduce and further investigate the results reported from the experiments of Acarlar and Smith [J. Fluid Mech. 175, 43 (1987)]. An isolated streak with an inflectional profile is generated that becomes unstable, resulting in a train of horseshoe vortices. The frequency of the vortex generation is equal to the experimental results. Comparison of the instability characteristics to those predicted through an Orr–Sommerfeld analysis are in good agreement. Second, a direct numerical simulation of a turbulent boundary layer is performed to point out the similarities between the horseshoe vortices in a turbulent and a laminar boundary layer. The characteristics of streaks and the vortical structures surrounding them in a turbulent boundary layer compare well with the model streak. The results of the present study show that one mechanism for the generation of horseshoe vortices in turbulent boundary layers is related to a normal inflectional instability of the streaks.en
dc.language.isoenen
dc.relation.ispartofseriesPhysics of fluidsen
dc.rights© 2002 American Institute of Physics. This paper was published in Physics of Fluids and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.1482377]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en
dc.subjectDRNTU::Engineering::Mechanical engineering::Fluid mechanicsen
dc.titleVaricose instabilities in turbulent boundary layersen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen
dc.identifier.doi10.1063/1.1482377en
dc.description.versionPublished versionen
dc.identifier.rims135422en
item.grantfulltextopen-
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