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- W2024888964 abstract "In this paper, different vortex diagnostic methods are compared to obtain a better understanding of boundary layer influence on the transport of vortical structures involving a complete analysis of vorticity, the Vorticity Threshold Criterion (VTC), and the Weiss Criterion (WC). These three techniques are basically confronted to find a suitable understanding of all flow characteristics for a range of laminar to transitional Reynolds numbers. The computations on this dihedral plane are done using a 2D DNS method. The Weiss criterion, coming from the analysis of the incompressible Euler equations is validated and applied to low speed compressible flows (Mach number=0.2). Ce travail est consacré à l'identification des structures cohérentes présentes dans l'écoulement d'un fluide visqueux au dessus d'un dièdre plan, en régime faiblement compressible (nombredeMach=0,2). Le critère de Weiss provenant de l'analyse incompressible est validé pour un écoulement faiblement compressible. Nous mettons en évidence que le critère de Weiss, appliqué à notre écoulement, est tout à fait pertinent et complémentaire au critère plus usuel de type «seuil de vorticité ». Plus précisemment, il permet de séparer les structures cohérentes de la couche limite, et ceci indépendemment de tout seuil donné a priori." @default.
- W2024888964 created "2016-06-24" @default.
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- W2024888964 date "2001-09-01" @default.
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- W2024888964 title "Identification of concentrated structures in slightly compressible two-dimensional flows" @default.
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- W2024888964 doi "https://doi.org/10.1016/s1620-7742(01)01388-5" @default.
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