ESPCI web site
Le séminaire hebdomadaire du laboratoire PMMH a lieu tous les vendredis à 11h, au premier étage Barre Cassan, campus Jussieu (plan).
Stéphane Perrard
Etienne Reyssat
Virgile Thiévenaz
PMMH
BARRE CASSAN
BAT A 1ER ETAGE CASE 18
7 QUAI SAINT BERNARD
75005 PARIS
France
Tel : (33) 1 40 79 45 22
Séminaire PMMH – Vincent Bertin (IUSTI, U. Aix-Marseille)
Lubrication Transition and Viscous Adhesion
The interplay between elastic and fluid stresses arises in a wide range of physical systems, often leading to rich and non-trivial dynamics. In this seminar, we explore two such scenarios in thin-film flows, with applications to friction and adhesion.
In the first part, we focus on the lubrication transition—the shift between frictional and lubricated contact. We show experimentally that introducing viscoelastic stresses via dilute polymer solutions significantly alters or delays this transition. Similarly,
in dense granular flows, coating particles with a soft polymeric layer dramatically modifies their frictional behaviour. Motivated by these findings, we propose a unified mean-field model that captures the essential features of the lubrication transition across
both systems.
In the second part, we investigate viscous adhesion—the effective adhesion between two soft surfaces separated by a thin liquid film. Despite the absence of direct contact, we show that the elastic response to viscous suction leads to an “adhesion without contact”
mechanism. This process exhibits striking analogies with classical JKR adhesion, yet arises purely from fluid-structure interactions.
- Archives des anciens séminaires
- Séminaires récents
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Séminaires récents (7)
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Séminaire PMMH - José Halloy (LIED, Univ. Paris Cité)
Vendredi 23 mai de 11h00 à 12h00 - Salle réunion PMMH 1
Energy Transition and Earth System Dynamics : Quantifying Long-Term Sustainability Trajectories for Human Societies
This talk explores how current industrial technologies - linear, extractive, and ecologically disruptive - must be replaced by systems designed in harmony with the Earth's living metabolism. Framing the planet as a dynamic, interdependent system rather than a passive resource pool leads to a fundamental rethinking (…) -
Séminaire PMMH - Julien Scheibert (LTDS, EC Lyon)
Vendredi 16 mai de 11h00 à 12h00 - Salle réunion PMMH 1
Metainterfaces : how to design a rough contact that obeys a specific friction law ?
Many devices, including touchscreens and robotic hands, involve frictional contacts. Optimizing those devices requires fine control of the interface's friction law. We lack systematic methods to create dry contact interfaces whose frictional behaviour satisfies preset specifications. In this seminar, I will present (…) -
Séminaire PMMH - Julien Scheibert (LTDS, EC Lyon)
Vendredi 16 mai de 11h00 à 12h00 - Salle réunion PMMH 1
Metainterfaces : how to design a rough contact that obeys a specific friction law ?
Many devices, including touchscreens and robotic hands, involve frictional contacts. Optimizing those devices requires fine control of the interface's friction law. We lack systematic methods to create dry contact interfaces whose frictional behaviour satisfies preset specifications. In this seminar, I will present (…) -
Séminaire PMMH – Olga Dudko (University of California at San Diego)
Vendredi 18 avril de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Olga Dudko (University of California at San Diego)
Vendredi 18 avril de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH - Máté Nagy (Eötvös Loránd University, Budapest)
Vendredi 11 avril de 11h00 à 12h00 - Salle réunion PMMH 1
Physics of animal collective behavior : interactions with one another and their environment
The breathtaking aerial displays and mesmerizing formations of birds, fish shoals and the thunderous gallop of hundreds of horses exemplify captivating group behaviors in nature. Traditional measurement methods fall short in capturing these intricate behaviors arising from simple individual interactions, (…) -
Séminaire PMMH - Máté Nagy (Eötvös Loránd University, Budapest)
Vendredi 11 avril de 11h00 à 12h00 - Salle réunion PMMH 1
Physics of animal collective behavior : interactions with one another and their environment
The breathtaking aerial displays and mesmerizing formations of birds, fish shoals and the thunderous gallop of hundreds of horses exemplify captivating group behaviors in nature. Traditional measurement methods fall short in capturing these intricate behaviors arising from simple individual interactions, (…)
Instructions générales pour les conférenciers
Le public du séminaire est très hétérogène (rien qu’au PMMH nous travaillons sur des thématiques très diverses, mécanique des fluides, des milieux granulaires, des solides, physique statistique, physique du mouillage, micro-fluidique, biophysique,...) l’objectif est donc de ne pas faire un séminaire trop spécialiste : au moins la première moitié du séminaire à un niveau accessible pour celui qui ne connaît rien sur le sujet.
Le séminaire a lieu à 11h. rendez-vous 15 minutes avant pour installer et tester la projection.
Le séminaire dure environ 45 minutes pour laisser un peu de temps pour discuter à la fin.
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