ESPCI web site
PMMH’s weekly seminar is held every Friday at 11 am (map)
Sylvain Patinet
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 – Martin Brandenbourger (IRPHÉ, Marseille)
Towards models of fluid transport in active vascular networks
Liquid flows in vascular networks are among the most effective ways to transport matter and
information for life. From animals to fungi, the most adaptable organisms utilize vascular
networks with vessels that actively contract upon local sensing of stimuli instead of central
pumping mechanisms. These self-contractions bring unique autonomous functionalities such
as adaptative locomotion and resilient immunity defense.
To finely control fluid flows in these networks and properly deliver matter and information, living organisms combine both passive and active interactions. One striking example is the lymphatic
system in which interstitial fluids are transported across the whole body of mammals against
intricate changes of pressures. In the collecting lymphatics, lymph is transported via active
vessel contractions combined with passive leaflets that ensure unidirectional transport. The
nature of the active contractions, the multi-scale and multi-physics of the system make it
challenging to model.
In the first part of this seminar, I will describe how the development of artificial models inspired by the lymphatic system enables systematical studies on the role of leaflets and channel
contractions. In the second part of this seminar, I will present the first steps toward the
development of robotic matter capable of mimicking active self-actuations observed in nature.
Model experiments combining passive elasticity and local active forces are used to develop
models predicting the mechanical properties of such active materials and demonstrate how
the interplay between dissipation, restoring forces and active forces controls their dynamics.
These results open the way to a better understanding of fluid transport in self-contracting
networks and the reproduction of living matter functionalities in artificial systems.
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Recent seminars (5)
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Séminaire PMMH – Céline Gabillet (École Navale de Brest)
Vendredi 4 octobre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH - Souhayl Sadik from (Aarhus University)
Vendredi 27 septembre de 11h00 à 12h00 - Salle réunion PMMH 1
Nonlinear Anisotropic Viscoelasticity
In this work, we revisit the mathematical foundations of nonlinear viscoelasticity. We study the un- derlying geometry of viscoelastic deformations, and in particular, the intermediate configuration. Starting from the direct multiplicative decomposition of the deformation gradient F = FeFv, into elastic and (...) -
Séminaire PMMH - Avin Babataheri (Ladhyx)
Vendredi 20 septembre de 11h00 à 12h00 - Salle réunion PMMH 1
1D confinement controls cell shape and migration
Pericytes are mural cells of the microvasculature, they wrap around small vessels, support the vessels mechanically and participate in blood flow regulation. Pericytes are distinguished by two main characteristics ; first their distinct morphology, which has been likened to a “bump on a log”, as they present long (...) -
Séminaire PMMH - Avin Babataheri (Ladhyx)
Vendredi 20 septembre de 11h00 à 12h00 - Salle réunion PMMH 1
1D confinement controls cell shape and migration
Pericytes are mural cells of the microvasculature, they wrap around small vessels, support the vessels mechanically and participate in blood flow regulation. Pericytes are distinguished by two main characteristics ; first their distinct morphology, which has been likened to a “bump on a log”, as they present long (...) -
Séminaire PMMH - François Graner (Laboratoire MSC & Université Paris-Cité))
Vendredi 13 septembre de 11h00 à 12h00 - Salle réunion PMMH 1
Should we forbid scientific research ?
Economic growth is not sustainable. Research, which is one of the pillars of economic growth, contributes to current environmental disasters and social inequalities. Conversely, research is often presented as part of the solution : many institutions and actors call for more funding of research to fuel so-called (...)
The audience is composed of people with rather heterogeneous backgrounds including specialists in solids, fluids, granular flows, statistical physics... so the idea is to keep your talk understandable by people not necessarily working in your field... The seminar time slot runs from 11am to noon so the best is to make the talk last around 45 minutes to leave some time for discussion.
- Séminaires ESPCI-ENS de biophysique
- Séminaires du Département de Physique de l’ENS
- Séminaires du Laboratoire d’Hydrodynamique de l’X
- Séminaire de Mécanique d’Orsay (page web FAST)
- Séminaire de Mécanique d’Orsay (page web LIMSI)
- Séminaire de Mécanique des Fluides de l’Institut Jean le Rond d’Alembert
- Séminaires du laboratoire MSC, Paris VII
- Séminaires Gulliver
Link to cofee seminar (internal, every Thursday)
