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UID:0-999@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20241203T110000
DTEND;TZID=Europe/Paris:20241203T120000
DTSTAMP:20241111T171155Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-marco-baiesi/
SUMMARY:Séminaire du LPTMS : Marco Baiesi (University of Padova) - Salle d
 es séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 3 Déc 24 1
 1:00
DESCRIPTION:Fluctuations of driven probes reveal nonequilibrium transitions
  in complex fluids \n\n\nMarco Baiesi\n(Dept. of Physics and Astronomy\, 
 University of Padova)\n\n\n\n\nComplex fluids under localized microscopic 
 energy inputs exhibit nonequilibrium behaviors only partially understood. 
 To identify changes in the fluid's microstructural conformation\, we intro
 duce a general method grounded in the breakdown of the equipartition theor
 em for laser-trapped probes dragged at a mean constant speed. Specifically
 \, we link the different scaling regimes in the probe's position variance\
 , obtained through large-scale Brownian simulations of a polymeric fluid\,
  to transitions from diffusive to jump dynamics\, where the fluid intermit
 tently relaxes accumulated stress. This view suggests that stored elastic 
 stress is a relevant physical mechanism behind recently measured nonlinear
  friction curves. Our approach overcomes some limitations of continuum mac
 roscopic descriptions and introduces an empirical method to experimentally
  detect nonequilibrium transitions in the fluids' structure.\n&nbsp\;\n\n&
 nbsp\;
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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DTSTART:20241027T020000
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