On the breakdown of boundary layer streaks
Web©2007 The Visualization Society of Japan Journal of Visualization, Vol. 10, No. 2 (2007)217-225 Influence of an Unfavourable Pressure Gradient on the Breakdown of Boundary Layer Streaks Chernoray, V. G.*1, Kozlov, V. V.*2, Lee, I.*3 and Chun, H. H.*3 *1 Applied Mechanics, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden. *2 … Webof streaks for flat-plate boundary layers was investigated in Refs. 9–11. From these numerical simulations, it was possible to in-vestigate the late stages of the breakdown triggered by the streak instability and identify the relevant flow structures. In the case of sinuous breakdown, the formation of quasi-
On the breakdown of boundary layer streaks
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WebDOI: 10.2514/1.j062638 Corpus ID: 257904225; Groove Coating's Effect on Linear and Nonlinear Instability of High-Speed Boundary Layer @article{Zhou2024GrooveCE, title={Groove Coating's Effect on Linear and Nonlinear Instability of High-Speed Boundary Layer}, author={Teng Zhou and Zaijie Liu and Chao Yan}, journal={AIAA Journal}, … WebNumerical simulations of bypass transition in Blasius boundary layers are presented. The breakdown of streamwise streaks is first considered in the case of the steady, spanwise periodic basic flows arising from the nonlinear saturation of optimal perturbations and then in the case of transition in boundary layers subject to free-stream turbulence.
Web10 de dez. de 2002 · A transition scenario initiated by streamwise low- and high-speed streaks in a flat-plate boundary layer is studied. ... D. S. 2001 On the breakdown of boundary layer streaks. Journal o f Fluid. ... Web8 de abr. de 2024 · In conclusion, grooves can delay Gortler vortex-induced transition by modifying the Gortler streaks structure and instability, which would shed light on hypersonic boundary layer transition control.
WebHá 1 dia · Thus, the roll-up of the shear layer appears in the second half of the bubble shedding large-scale vortices that keep their identity far downstream at low fst levels. On … WebThis paper aims at characterizing the bypass transition in boundary layers subject to strong pressure gradient and curvature effects. A series of highly resolved large-eddy …
WebThis is followed by their breakdown through a process known as the lift-up mechanism (Kline et al., 1967), where negative perturbation streaks rise within the boundary layer. The external high-frequency disturbances, which are limited in their penetration, provide excitation for the growth of an outer instability leading to turbulent breakdown of the streak.
Web31 de out. de 2008 · Recent theoretical, numerical, and experimental investigations performed at the Department of Mechanics, KTH Stockholm, and the Department of Mechanical Engineering, Eindhoven University of Technology, are reviewed, and new material is presented to clarify the role of the boundary-layer streaks and their … devastating synonymWeb2 de ago. de 2016 · On the breakdown of boundary layer streaks. J. Fluid Mech. 428, 29–60 (2001) Article MATH MathSciNet Google Scholar Bagheri, S., Hanifi, A.: The stabilizing effect of streaks on ... Talamelli, A.: On the generation of steady streamwise streaks in flat-plate boundary layers. J. Fluid Mech. 698, 211–234 (2012) devastation evoker consumablesWebstreamwise streaks in a Blasius boundary layer. by Luca Brandt May2001 ... D. S. 2001 On the breakdown of boundary layer streaks. Journal of Fluid Mechanics,428,pp. 29-60. Paper 3. devastating newsWeb13 de fev. de 2014 · The base flow is computed in direct simulations of bypass transition. The random nature of the free-stream perturbations causes the formation of a spectrum … churches branford ctWebUsing Floquet theory, the instability of thesestreaks is studied to determine the features of theirbreakdown. The streak critical amplitude, beyond which unstablewaves are excited, … devastating hurricanesWeb10 de fev. de 2001 · On the breakdown of boundary layer streaks Authors: Luca Brandt KTH Royal Institute of Technology ALESSANDRO BOTTARO Abstract and Figures A … devastating weather eventsWebbations developing on boundary layer streamwise streaks. These elongated structures and their breakdown are found to be key factors both in transition in boundary layers … churches brantford