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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-428@lptms.universite-paris-saclay.fr
DTSTART:20160405T110000Z
DTEND:20160405T120000Z
DTSTAMP:20160322T130744Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-remy-dubertrand-2/
SUMMARY:Séminaire du LPTMS: Rémy Dubertrand - LPTMS\, salle 201\, 2ème 
 étage\, Bât 100\, Campus d'Orsay - 5 Avr 16 11:00
DESCRIPTION:Scattering theory of walking droplets in the presence of obstac
 les\nRémy Dubertrand (Université de Liège\, Belgique)\nWalking droplets
  that are sustained on the surface of a vibrating liquid\, have attracted 
 considerable attention during the past decade due to their remarkable anal
 ogy with quantum wave-particle duality. This was initiated by the pioneeri
 ng experiment by Y. Couder and E. Fort in 2006\, which reported the observ
 ation of a diffraction pattern in the angular resolved profile of droplets
  that propagated across a single slit obstacle geometry. While the occurre
 nce of this wave-like phenomenon can be qualitatively traced back to the c
 oupling of the droplet with its associated surface wave\, a quantitative f
 ramework for the description of the surface-wave-propelled motion of the d
 roplet in the presence of confining boundaries and obstacles still represe
 nts a major challenge. This problem is all the more stimulating as several
  experiments have already reported clear effects of the geometry on the dy
 namics of walking droplets.\n\nHere we present a simple model inspired fro
 m quantum mechanics for the dynamics of a walking droplet in an arbitrary 
 geometry. We propose to describe its trajectory using a Green function app
 roach. The Green function is related to the Helmholtz equation with Neuman
 n boundary conditions on the obstacle(s) and outgoing conditions at infini
 ty.\nFor a single slit geometry our model is exactly solvable and reproduc
 es some of the features observed experimentally. It stands for a promising
  candidate to account for the presence of boundaries in the walker's dynam
 ics.
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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