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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-577@lptms.universite-paris-saclay.fr
DTSTART:20180313T110000Z
DTEND:20180313T113000Z
DTSTAMP:20180301T144427Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-alexandre-nicolas-2/
SUMMARY:Séminaire du LPTMS: Alexandre Nicolas - LPTMS\, salle 201\, 2ème 
 étage\, Bât 100\, Campus d'Orsay - 13 Mar 18 11:00
DESCRIPTION:Bottleneck flows of pedestrians and grains\n\nAlexandre Nicolas
  (LPTMS\, Université Paris-Sud)\nSimple models from Statistical Physics c
 an be surprisingly useful to study practical problems that lie outside the
  traditional realm of Physics. I will illustrate this statement with two d
 istinct (yet related!) examples: granular flows through a constriction and
  competitive passages of pedestrians through a door.\n\nTo destroy clogs i
 n constricted granular flows\, vibrations are often applied to the hopper 
 or silo\, but clogs do not yield instantly. Instead\, they exhibit an anom
 alously broad distribution of lifetimes. This elusive feature was recently
  captured within a model in which we likened the destruction of clogs to t
 hermally activated escapes from a set of energy traps\; the model also rep
 roduces other salient experimental observations [1]. Turning to the second
  example\, competitive pedestrian flows through a narrow door look very di
 sordered\, and yet they were found to present robust statistical features\
 , such as anticorrelated time gaps between escapes and exponentially distr
 ibuted bursts of escapes. On the basis of simple models\, we have shown th
 at in fact these features emerge generically in constricted flows [2].\n\n
 	[1] Alexandre Nicolas\, Ángel Garcimartín and Iker Zuriguel\, "A trap m
 odel for clogging and unclogging in granular hopper flows" (2017)\, prepri
 nt arxiv:1711.04455\n	[2] Alexandre Nicolas and  Ioannis Touloupas\, Orig
 in of the correlations between exit times in pedestrian flows through a bo
 ttleneck\, J. Stat. Mech.: Theor. Exp. 2018(1)\, 013402.\n\n
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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