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UID:6564@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20210127T140000
DTEND;TZID=Europe/Paris:20210127T150000
DTSTAMP:20241120T201741Z
URL:https://www.i2m.univ-amu.fr/evenements/title-to-be-announced-kunihiko-
 taira/
SUMMARY:Kunihiko Taira (Mechanical and Aerospace Engineering\, UCLA\, USA):
  Tackling the complex vortex dynamics around wings with simulation\, model
 ing\, and control - Kunihiko Taira
DESCRIPTION:Kunihiko Taira: While the setup of a wing in freestream may app
 ear simple\, the flow generated in its wake exhibits remarkably rich dynam
 ics. This is especially true for a finite-aspect-ratio wing at a post-stal
 l angle of attack\, which is often the wing of choice for birds\, insects\
 , and modern aircraft. The wing aspect ratio\, angle of attack\, sweep\, R
 eynolds number\, and Mach number (!) all uniquely contribute to the comple
 x dynamics [1\, 2\, 3]. Although low-aspect-ratio wings are ever more prev
 alent in aeronautical designs\, understanding of these flows is limited du
 e to the vast parameter space. To gain fundamental insights into low-aspec
 t-ratio wing flows at low Reynolds numbers\, we computationally examine th
 e importance of three-dimensional separation and wake behavior. Furthermor
 e\, a brief survey of our recent efforts to model and control these flows 
 with modal analysis and data-driven techniques will be provided [4\, 5\, 6
 ].\n[1] K. Taira and T. Colonius\, “Three-Dimensional Flows around Low-A
 spect-Ratio Flat-Plate Wings at Low Reynolds Numbers\,” Journal of Fluid
  Mechanics\, 623\, 187-207\, 2009.\n[2] K. Zhang\, S. Hayostek\, M. Amitay
 \, W. He\, V. Theofilis\, and K. Taira\, “On the Formation of Three-Dime
 nsional Flows over Wings under Tip Effects\,” Journal of Fluid Mechanics
 \, 895\, A9\, 2020.\n[3] K. Zhang\, S. Hayostek\, M. Amitay\, A. Burtsev\,
  V. Theofilis\, and K. Taira\, “Laminar Separated Flows over Finite-Aspe
 ct-Ratio Swept Wings\,” Journal of Fluid Mechanics\, 905\, R1\, 2020.\n[
 4] A. M. Edstrand\, Y. Sun\, P. J. Schmid\, K. Taira\, and L. N. Cattafest
 a\, “Active Attenuation of a Trailing Vortex Inspired by a Parabolized S
 tability Analysis\,” Journal of Fluid Mechanics\, 855\, R2\, 2018.\n[5] 
 K. Taira\, M. S. Hemati\, S. L. Brunton\, Y. Sun\, K. Duraisamy\, S. Baghe
 ri\, S. T. M. Dawson\, and C.-A. Yeh\, “Modal Analysis of Fluid Flows: A
 pplications and Outlook\,” AIAA Journal\, 58(3)\, 998-1022\, 2020.\n[6] 
 A. G. Nair\, C.-A. Yeh\, E. Kaiser\, B. R. Noack\, S. L. Brunton\, and K. 
 Taira\, “Cluster-Based Feedback Control of Turbulent Post-Stall Separate
 d Flows\,” Journal of Fluid Mechanics\, 875\, 345-375\, 2019.\nIOSSB Sem
 inar\n\n[su_spacer]
ATTACH;FMTTYPE=image/jpeg:https://www.i2m.univ-amu.fr/wp-content/uploads/2
 020/11/Kunihiko_Taira.jpg
CATEGORIES:Interdisciplinary online seminar series on
 Biolocomotion,Virtual event
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