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SUMMARY:Spectral stability of inviscid columnar vortices
DTSTART:20190524T141500
DTEND:20190524T151500
DTSTAMP:20261001T014142Z
UID:685cbcba688ed8f06cc30b8389dcd66a0c4aa148b160ae9bd0d30951
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Thierry GALLAY (Institut Fourier\, Université Grenoble 
 Alpes)\n\nAbstract:\n\nColumnar vortices are axisymmetric stationary solut
 ions of the three-dimensional Euler equations\, where the velocity field o
 nly depends on the distance to the symmetry axis and has no component in t
 he axial direction. These solutions were already studied in the nineteenth
  century\, starting with the pioneering work of Kelvin and Rayleigh\, but 
 until recently the stability analysis was restricted to either axisymmetri
 c or two-dimensional perturbations. The purpose of this talk is to give a 
 sufficient condition on the velocity profile to ensure spectral stability 
 with respect to arbitrary perturbations\, with no particular symmetry. The
  result applies to a large family of velocity profiles\, including the mos
 t common models in atmospheric flows and engineering applications. This is
  joint work with Didier Smets (Paris).\n 
LOCATION:MA B1 11 https://plan.epfl.ch/?room=MAB111
STATUS:CONFIRMED
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