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SUMMARY:Oscillating in Turbulence
DTSTART:20260427T110000
DTEND:20260427T120000
DTSTAMP:20260428T180156Z
UID:f3b10c43b90bb80328ec5bce7ada392206ac41dd3c5357c1dda205ed
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Stéphane Perrard\nAbstract : \nInspired by the artist 
 Ned Kahn’s\, who has built kinetic façades of buildings to reveal the h
 idden nature of the wind\, we study with J. Zhang the oscillation of light
  structures in wind. We study in particular the oscillation of a collectio
 n of pendulum\, moving in the direction perpendicular to the wind. Startin
 g from observations of the kinetic façades\, we have build laboratory sca
 les experiments\, and intermediate scale version in wind tunnel using smar
 tphones as both oscillating structure and instrument. We then move to the 
 oscillation of a single pendulum\, and study its response to the wind\, re
 vealing that linear perturbation theory can apply\, and some features of t
 he wind can hence be revealed.\n\n\nBio :\nStéphane Perrard obtained PhD 
 from University Paris-Cité in 2014\, supervised by Yves Couder and Emmanu
 el Fort on wave-particle interaction dynamics. Postdoctoral Scholar at the
  University of Chicago\, Princeton U.\, U. Paris-Saclay\, Ecole Polytechni
 que and Junior Research Chair at Ecole Normale Supérieure Paris from 2018
  to 2021\, he is a CNRS researcher at ESPCI since 2022\, in PMMH Laborator
 y. \nWith a main background in experimental fluid mechanics\, in particul
 ar on free surface flows\, surface waves\, and large Reynolds number dynam
 ics\, he developed laboratory experiments and numerical simulations inspir
 ed by geophysical situations\, such as ocean-atmosphere interactions (bubb
 le fragmentation in turbulence) and ocean waves-sea ice interactions.\nOve
 r the last few years\, Stéphane Perrard has started to study sea ice dyna
 mics\, crossing scale from laboratory experiments to field experiments in 
 the Saint Lawrence Estuary. Inspired by field observation\, he developed r
 esearch activities around oscillating dynamics of large objects in turbule
 nce\, combining laboratory and field measurements. \n 
LOCATION:ME D1 1518 https://plan.epfl.ch/?room==MED%201%201518
STATUS:CONFIRMED
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