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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-597@lptms.universite-paris-saclay.fr
DTSTART:20180403T113000Z
DTEND:20180403T120000Z
DTSTAMP:20180326T183827Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-mehdi-bouzid/
SUMMARY:Séminaire du LPTMS: Mehdi Bouzid - LPTMS\, salle 201\, 2ème étag
 e\, Bât 100\, Campus d'Orsay - 3 Avr 18 11:30
DESCRIPTION:Athermal analogue of sheared colloidal suspensions\nMehdi Bouzi
 d (LPTMS\, Université Paris-Sud)\nSand-piles\, window glass\, tomato ketc
 hup\, are three materials that would not necessarily strike the larger pub
 lic for their similarities. However\, they take part of one of the most li
 ngering enigma of condensed matter physics as they are examples of fluids 
 undergoing dynamical arrest and becoming solid in a way essentially differ
 ent from a thermodynamic phase transition. Such complex fluids\, developin
 g a yield-stress and becoming very hard solids (metallic or oxide glasses)
  or soft glassy materials (colloidal pastes\, granular packing\, polymer m
 elts ...)\, are of central importance in statistical physics\, material sc
 ience or chemical engineering. In this talk I will highlight an analogy be
 tween the rheology of Brownian and  non-Brownian  suspensions\, we show 
 that these systems can be described by a Herschel-Bulkley law as soon as t
 he shear rate and shear stress  are respectively normalized by an energy 
 scale and a microscopic time of reorganization\, which are both functions 
 of the normal confinement stress. The pressure-controlled approach\, orig
 inally developed for granular flows\, reveals a striking physical analogy
  between the colloidal glass transition and the granular jamming transiti
 on.
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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