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X-ORIGINAL-URL:https://www.lps.u-psud.fr/
X-WR-CALNAME:Laboratoire de physique des Solides
X-WR-CALDESC:
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BEGIN:VEVENT
CLASS:PUBLIC
DTSTART;TZID=Europe/Paris:20241122T110000
DTEND;TZID=Europe/Paris:20241122T120000
DTSTAMP:20241023T133100
UID:MEC-d0cbf1a1aa1726784df15a81ead214f7@lps.u-psud.fr
CREATED:20241023
LAST-MODIFIED:20241115
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Séminaire Ruben Zakine
DESCRIPTION:\nThe elusive surface tension of active fluids\n\n\n\nPhase transitions and phase separations in active matter systems are now ubiquitous. Nonetheless, since relying on a free energy-based definition of surface tension is impossible in these systems, the stability of the interfaces is usually difficult to characterize. In this seminar, I will discuss various quantities that show some relevance to define a surface tension out of equilibrium. In particular, I will propose a purely mechanical definition of surface tension in assemblies of self-propelled particles. Notably, the mechanical probes we use in our simulations enable one to measure the fluid-solid and the liquid-gas surface tensions, which paves the way of recovering an analogue of the Young-Dupré law for active liquid spreading.\n\n\n\nImage: Active particles condensing at a wall (by Yongfeng Zhao)\n\n\n\n\n
URL:https://www.lps.u-psud.fr/events/seminaire-ruben-zakine/
CATEGORIES:Séminaire Matière Molle Phys-Bio
LOCATION:Orsay
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