
Adrien IzzetFrench National Institute for Agriculture, Food, and Environment (INRAE) | INRAE · SayFood
Adrien Izzet
PhD
Rheology of suspensions, granular flows, amorphous media, tribology, active matter (swimming droplets, micro-organisms).
About
13
Publications
3,344
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270
Citations
Introduction
Research scientist working at INRAE. My research focuses on Soft Condensed Matter, namely the behavior of one-to-many particles systems. My work includes the rheology of suspensions and dry granular media; the packing properties of jammed matter and bio-inspired emulsions; particle motion in Active Matter (swimming droplets).
My approach is mainly experimental, with a strong acquaintance with theory and numerical simulations (molecular dynamics, random walks of active particles...).
Additional affiliations
September 2021 - present
Education
September 2013 - May 2017
September 2012 - August 2013
École Polytechnique (LadHyX) - UPMC (Jean Le Rond ∂'Alembert lab.)
Field of study
- Fluid Mechanics
September 2011 - August 2012
ENS Paris-Saclay
Field of study
- Mechanics and Mechanical Engineering
Publications
Publications (13)
In living matter, concentration gradients of nutrients carve the motility of microorganisms in a heterogeneous environment. Here, we use swimming droplets as a model system to study how swimmer-trail interactions guide locomotion. Combining experiments and theory, we show that our non-Markovian droplet model quantitatively captures droplet motility...
Swimming droplets are a class of active particles whose motility changes as a function of time due to shrinkage and self-avoidance of their trail. Here we combine experiments and theory to show that our non-Markovian droplet (NMD) model, akin to a true self-avoiding walk [1], quantitatively captures droplet motion. We thus estimate the effective te...
E-cadherin plays a central role in cell-cell adhesion. The ectodomains of wild type cadherins form a crystalline-like two dimensional lattice in cell-cell interfaces mediated by both trans (apposed cell) and cis (same cell) interactions. In addition to these extracellular forces, adhesive strength is further regulated by cytosolic phenomena involvi...
Despite their apparent simplicity, suspensions of hard spheres in a Newtonian fluid show complex non-Newtonian behaviors and remain poorly understood. Recent works have pointed out the crucial role of interparticle contact forces in these behaviors. Here, we show that the same (polystyrene) particles, when immersed in different Newtonian solvents,...
Despite their apparent simplicity, suspensions of hard spheres in a Newtonian fluid show complex non-Newtonian behaviors and remain poorly understood. Recent works have pointed out the crucial role of interparticle contact forces in these behaviors. Here, we show that the same (polystyrene) particles, when immersed in different Newtonian solvents,...
We characterize the motility of athermal swimming droplets within the framework of a persistent random walk. Just like active colloids, their trajectories can be modeled with a constant velocity V and a slow angular diffusion, but the random changes in direction are not thermally driven. Instead, V is determined by the interfacial tension gradient...
Here we characterize the motility of athermal swimming droplets within the framework of active rotational diffusion. Just like active colloids, their trajectories can be modeled with a constant velocity $V$ and a slow angular diffusion, but the random changes in direction are not thermally driven. Instead, $V$ is determined by the interfacial tensi...
The rheology of dense granular flows is studied numerically in a shear cell controlled at constant pressure and shear stress, confined between two granular shear flows. We show that a liquid state can be achieved even far below the yield stress, whose flow can be described with the same rheology as above the yield stress. A non-local constitutive r...
In their dense state, granular media can either flow like fluids or behave like solids, when they are jammed. The first part of this thesis deals with the flowing regime. We begin by presenting the non-local rheology and discuss this model with respect to the other ones proposed in the community. In order to probe this model, we perform experimenta...
The aim of this article is to discuss the concepts of non-local rheology and fluidity, recently introduced to describe dense granular flows. We review and compare various approaches based on different constitutive relations and choices for the fluidity parameter, focusing on the kinetic elasto-plastic model introduced by Bocquet et al. (Phys. Rev....
The aim of this article is to discuss the concepts of non-local rheology and
fluidity, recently introduced to describe dense granular flows. We review and
compare various approaches based on different constitutive relations and
choices for the fluidity parameter, focusing on the kinetic elasto-plastic
model introduced by Bocquet et al. [Phys. Rev....
Small bodies like asteroids and comets are affected by the seismic waves
generated by impacts, as the maximum acceleration of these waves exceed
their local gravity. This seismic shaking is not understood however, as
no space mission to date has deployed seismometers on a small body and
as their detailed internal structure and seismic properties is...
Questions
Question (1)
Here is the ref. I am looking for: Mindlin, J. Appl. Mech. 24, 585 (1957)
Thank you in advance!