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Stability analysis of the flow past miniature vortex generators in a Blasius boundary layer
Author(s) -
Siconolfi Lorenzo,
Camarri Simone,
Fransson Jens H. M.
Publication year - 2015
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201510233
Subject(s) - boundary layer , vortex , mechanics , physics , blasius boundary layer , flow (mathematics) , boundary (topology) , amplitude , stability (learning theory) , direct numerical simulation , classical mechanics , flow separation , turbulence , mathematics , mathematical analysis , optics , computer science , machine learning , reynolds number
It is shown in the literature that Tollmien−Schlichting waves can be damped and transition delayed by a proper modulation of the streamwise velocity in a boundary layer (BL), which can be obtained using miniature vortex generators (MVGs). Experiments show that the amplitude of TS waves is not always monotonically damped past the MVGs. In this study, direct numerical simulations and local stability analysis have been performed in order to provide an interpretation of the experiments and to characterize further the stabilization mechanism induced by this type of control. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)