PMMH Laboratory
@pmmh-lab.bsky.social
Research unit on #physics and #mechanics of heterogeneous media
CNRS, ESPCI Paris-PSL, Sorbonne Université, Université Paris Cité
France
Home: www.pmmh.espci.fr
🦣: mathstodon.xyz/@PMMH_lab
CNRS, ESPCI Paris-PSL, Sorbonne Université, Université Paris Cité
France
Home: www.pmmh.espci.fr
🦣: mathstodon.xyz/@PMMH_lab
Both examples highlight intricate hydrodynamic couplings in active systems and their potential consequences for the accumulation of microbial communities and the onset of biofilm formation.
November 4, 2025 at 2:32 PM
Both examples highlight intricate hydrodynamic couplings in active systems and their potential consequences for the accumulation of microbial communities and the onset of biofilm formation.
Although in the absence of flow, agents accumulate at boundaries, shear also generates extended trapping phases of microswimmers in areas of the flow backbone, leading to prominent power-law tails in the exit-time distributions.
November 4, 2025 at 2:32 PM
Although in the absence of flow, agents accumulate at boundaries, shear also generates extended trapping phases of microswimmers in areas of the flow backbone, leading to prominent power-law tails in the exit-time distributions.
behaviors that are fundamentally different to swimming near rigid walls. In the second part, I will discuss the impact of flows on active transport through a disordered, porous channel.
November 4, 2025 at 2:32 PM
behaviors that are fundamentally different to swimming near rigid walls. In the second part, I will discuss the impact of flows on active transport through a disordered, porous channel.
In this talk, I will first discuss the hydrodynamic interactions of microswimmers with a nearby deformable boundary, like a biological membrane. Using a far-field description for the flows and a perturbation theory for small deformations, we find that elastohydrodynamic couplings can generate
November 4, 2025 at 2:32 PM
In this talk, I will first discuss the hydrodynamic interactions of microswimmers with a nearby deformable boundary, like a biological membrane. Using a far-field description for the flows and a perturbation theory for small deformations, we find that elastohydrodynamic couplings can generate
Swimming microorganisms represent fascinating exemplars of non-equilibrium systems and display a range of unusual physical phenomena. These active agents often operate in complex environments, characterized by confining boundaries and flows, that can strongly modify their swimming dynamics.
November 4, 2025 at 2:32 PM
Swimming microorganisms represent fascinating exemplars of non-equilibrium systems and display a range of unusual physical phenomena. These active agents often operate in complex environments, characterized by confining boundaries and flows, that can strongly modify their swimming dynamics.
#### Come to PMMH laboratory: www.pmmh.espci.fr/Contact-357
#### Coming Seminars
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Nov 28: Paddy Royall (Gulliver)
Dec 5: Francesca Borghi (U. Milan)
Full list at www.pmmh.espci.fr/Seminaires.
#### Coming Seminars
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Nov 28: Paddy Royall (Gulliver)
Dec 5: Francesca Borghi (U. Milan)
Full list at www.pmmh.espci.fr/Seminaires.
Physique et Mécanique des Milieux Hétérogènes
UMR 7636 : Come to PMMH
Physique et Mécanique des Milieux Hétérogènes
www.pmmh.espci.fr
November 4, 2025 at 2:32 PM
#### Come to PMMH laboratory: www.pmmh.espci.fr/Contact-357
#### Coming Seminars
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Nov 28: Paddy Royall (Gulliver)
Dec 5: Francesca Borghi (U. Milan)
Full list at www.pmmh.espci.fr/Seminaires.
#### Coming Seminars
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Nov 28: Paddy Royall (Gulliver)
Dec 5: Francesca Borghi (U. Milan)
Full list at www.pmmh.espci.fr/Seminaires.
Reposted by PMMH Laboratory
José BICO, formé à l'ESPCI et diplômé #Ingénieur en 1996 (#ESPCIAlum 111e promotion), professeur @espciparispsl.bsky.social et chercheur @pmmh-lab.bsky.social, a été élu Fellow de l'American Physical Society @apsphysics.bsky.social :
www.aps.org/funding-reco...
c/ @olivetree33.bsky.social
[3/3]
www.aps.org/funding-reco...
c/ @olivetree33.bsky.social
[3/3]
Division of Statistical and Nonlinear Physics Fellowship
The American Physical Society is a nonprofit membership organization working to advance physics by fostering a vibrant, inclusive, and global community dedicated to science and society.
www.aps.org
October 24, 2025 at 10:38 AM
José BICO, formé à l'ESPCI et diplômé #Ingénieur en 1996 (#ESPCIAlum 111e promotion), professeur @espciparispsl.bsky.social et chercheur @pmmh-lab.bsky.social, a été élu Fellow de l'American Physical Society @apsphysics.bsky.social :
www.aps.org/funding-reco...
c/ @olivetree33.bsky.social
[3/3]
www.aps.org/funding-reco...
c/ @olivetree33.bsky.social
[3/3]
"For outstanding contributions to elasto-capillary phenomena, elastic instabilities, and shape-morphing materials that combine creative experiments and elegant modeling."
https://www.aps.org/funding-recognition/aps-fellowship/dsnp-fellowship
https://www.aps.org/funding-recognition/aps-fellowship/dsnp-fellowship
October 10, 2025 at 8:20 AM
"For outstanding contributions to elasto-capillary phenomena, elastic instabilities, and shape-morphing materials that combine creative experiments and elegant modeling."
https://www.aps.org/funding-recognition/aps-fellowship/dsnp-fellowship
https://www.aps.org/funding-recognition/aps-fellowship/dsnp-fellowship
We will show how this invariant may be used to quickly derive useful information on the equilibrium shapes of elastica in self-contact or in interaction with obstacles, sliding sleeves, force fields, and droplets.
October 8, 2025 at 9:41 PM
We will show how this invariant may be used to quickly derive useful information on the equilibrium shapes of elastica in self-contact or in interaction with obstacles, sliding sleeves, force fields, and droplets.
This static-dynamic analogy allows us to write a quantity that is invariant along the elastic rod at equilibrium. For a pendulum, mechanical energy constant in time whereas, for a planar elastica, the sum of its curvature energy and its axial force will be uniform along the structure.
October 8, 2025 at 9:41 PM
This static-dynamic analogy allows us to write a quantity that is invariant along the elastic rod at equilibrium. For a pendulum, mechanical energy constant in time whereas, for a planar elastica, the sum of its curvature energy and its axial force will be uniform along the structure.
The static-dynamic analogy discovered by G. Kirchhoff shows that the statics of the planar elastica are equivalent to the dynamics of the pendulum. In this analogy, time and angular velocity are, for example, equivalent to arc length and curvatures.
October 8, 2025 at 9:41 PM
The static-dynamic analogy discovered by G. Kirchhoff shows that the statics of the planar elastica are equivalent to the dynamics of the pendulum. In this analogy, time and angular velocity are, for example, equivalent to arc length and curvatures.
To come to PMMH:
www.pmmh.espci.fr/Contact-357
Coming Seminars:
Oct 17: Marie Poulain-Zarcos (LMFA, Lyon)
Nov 7: Christina Kurzthaler (Max-Planck Dresden)
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Full list at www.pmmh.espci.fr/Seminaires.
www.pmmh.espci.fr/Contact-357
Coming Seminars:
Oct 17: Marie Poulain-Zarcos (LMFA, Lyon)
Nov 7: Christina Kurzthaler (Max-Planck Dresden)
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Full list at www.pmmh.espci.fr/Seminaires.
October 8, 2025 at 9:41 PM
To come to PMMH:
www.pmmh.espci.fr/Contact-357
Coming Seminars:
Oct 17: Marie Poulain-Zarcos (LMFA, Lyon)
Nov 7: Christina Kurzthaler (Max-Planck Dresden)
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Full list at www.pmmh.espci.fr/Seminaires.
www.pmmh.espci.fr/Contact-357
Coming Seminars:
Oct 17: Marie Poulain-Zarcos (LMFA, Lyon)
Nov 7: Christina Kurzthaler (Max-Planck Dresden)
Nov 14: Romain Mari (LiPhy, Grenoble)
Nov 21: Christiana Mavroyiakoumou (Oxford, UK)
Full list at www.pmmh.espci.fr/Seminaires.
I will show that fracture toughness increases with the square root of the defect fraction.
This counterintuitive effect highlights how disorder, rather than weakening, can reinforce materials by arresting cracks.
This counterintuitive effect highlights how disorder, rather than weakening, can reinforce materials by arresting cracks.
October 1, 2025 at 8:47 PM
I will show that fracture toughness increases with the square root of the defect fraction.
This counterintuitive effect highlights how disorder, rather than weakening, can reinforce materials by arresting cracks.
This counterintuitive effect highlights how disorder, rather than weakening, can reinforce materials by arresting cracks.
fracture in heterogeneous materials, and the pinning of elastic lines.
In the second part, I shift from adhesive contacts to fracture in bulk disordered materials. Using numerical simulations of spring networks with randomly removed bonds,
In the second part, I shift from adhesive contacts to fracture in bulk disordered materials. Using numerical simulations of spring networks with randomly removed bonds,
October 1, 2025 at 8:47 PM
fracture in heterogeneous materials, and the pinning of elastic lines.
In the second part, I shift from adhesive contacts to fracture in bulk disordered materials. Using numerical simulations of spring networks with randomly removed bonds,
In the second part, I shift from adhesive contacts to fracture in bulk disordered materials. Using numerical simulations of spring networks with randomly removed bonds,
—a phenomenon known as adhesion hysteresis.
In the first part of this talk, I will show that adhesion hysteresis originates from the pinning of the contact perimeter by surface roughness. This mechanism connects adhesion hysteresis to broader phenomena such as contact angle hysteresis,
In the first part of this talk, I will show that adhesion hysteresis originates from the pinning of the contact perimeter by surface roughness. This mechanism connects adhesion hysteresis to broader phenomena such as contact angle hysteresis,
October 1, 2025 at 8:47 PM
—a phenomenon known as adhesion hysteresis.
In the first part of this talk, I will show that adhesion hysteresis originates from the pinning of the contact perimeter by surface roughness. This mechanism connects adhesion hysteresis to broader phenomena such as contact angle hysteresis,
In the first part of this talk, I will show that adhesion hysteresis originates from the pinning of the contact perimeter by surface roughness. This mechanism connects adhesion hysteresis to broader phenomena such as contact angle hysteresis,
Soft solids tend to stick: bringing two surfaces together lowers their surface energy, and separating them requires tensile forces. This simple energy balance, however, cannot explain why soft materials stick more strongly when we pull them apart than when they first come into contact
October 1, 2025 at 8:47 PM
Soft solids tend to stick: bringing two surfaces together lowers their surface energy, and separating them requires tensile forces. This simple energy balance, however, cannot explain why soft materials stick more strongly when we pull them apart than when they first come into contact
Together, these results illustrate how active filamentous systems harness shape and flexibility to adapt, spread, and organize matter in complex environments.
September 22, 2025 at 7:24 PM
Together, these results illustrate how active filamentous systems harness shape and flexibility to adapt, spread, and organize matter in complex environments.
Complementary experiments with robotic filaments and simulations reveal the same principles, providing a framework for locomotion in fixed landscapes and particle collection in mobile ones.
September 22, 2025 at 7:24 PM
Complementary experiments with robotic filaments and simulations reveal the same principles, providing a framework for locomotion in fixed landscapes and particle collection in mobile ones.
In the second part, we will discuss how the same worms, when interacting with freely moving particles, can act as autonomous collectors : repeated contact and bending drive aggregation into clusters whose size is controlled by filament length and flexibility.
September 22, 2025 at 7:24 PM
In the second part, we will discuss how the same worms, when interacting with freely moving particles, can act as autonomous collectors : repeated contact and bending drive aggregation into clusters whose size is controlled by filament length and flexibility.
We will first show how worms navigate quasi-2D arrays of obstacles: ordered pillar lattices confine and trap them, while disordered environments paradoxically enhance their spreading, with activity levels playing a key role in mobility.
September 22, 2025 at 7:24 PM
We will first show how worms navigate quasi-2D arrays of obstacles: ordered pillar lattices confine and trap them, while disordered environments paradoxically enhance their spreading, with activity levels playing a key role in mobility.