250 citations · 2k across the 84 of their papers we have counts for
101 papers
The hidden side of paintbrushes: a geometry shaped by power laws
Raphaelle Taub, Jérôme Crassous, Thomas Salez +2
Since prehistoric times, painters have used brush-like tools made from animal and plant materials to apply pigments to rock surfaces. Over time, techniques for creating brushes evo…
Surface mobility of a glass-forming polymer in an ionic liquid
Xinyu Zhang, Christian Pedersen, Haoqi Zhu +6
The free surface of glassy polymers exhibits enhanced segmental dynamics compared to the bulk, forming a liquid-like layer that lowers the glass transition temperature (Tg) in nano…
Bidirectional Mamba state-space model for anomalous diffusion
Maxime Lavaud, Yosef Shokeeb, Juliette Lacherez +2
Characterizing anomalous diffusion is crucial in order to understand the evolution of complex stochastic systems, from molecular interactions to cellular dynamics. In this work, we…
Taylor's swimming sheet near a soft boundary
Aditya Jha, Yacine Amarouchene, Thomas Salez
In 1951, G.I. Taylor modeled swimming microorganisms by hypothesizing an infinite sheet in 2D moving in a viscous medium due to a wave passing through it. This simple model not onl…
Swelling and evaporation determine surface morphology of grafted hydrogel thin films
Caroline Kopecz-Muller, Clémence Gaunand, Yvette Tran +5
We experimentally study the formation of surface patterns in grafted hydrogel films of nanometer-to-micrometer thicknesses during imbibition-driven swelling followed by evaporation…
Singular viscoelastic perturbation to soft lubrication
Bharti Bharti, Quentin Ferreira, Aditya Jha +5
Soft lubrication has been shown to drastically affect the mobility of an object immersed in a viscous fluid in the vicinity of a purely elastic wall. In this theoretical study, we…
Capillary lubrication of a spherical particle near a fluid interface
Aditya Jha, Yacine Amarouchene, Thomas Salez
The lubricated motion of an object near a deformable boundary presents striking subtleties arising from the coupling between the elasticity of the boundary and lubricated flow, inc…
Direct measurement of the viscocapillary lift force near a liquid interface
Hao Zhang, Zaicheng Zhang, Aditya Jha +5
Lift force of viscous origin is widespread across disciplines, from mechanics to biology. Here, we present the first direct measurement of the lift force acting on a particle movin…
Observation of Brownian elastohydrodynamic forces acting on confined soft colloids
Nicolas Fares, Maxime Lavaud, Zaicheng Zhang +3
Confined motions in complex environments are ubiquitous in microbiology. These situations invariably involve the intricate coupling between fluid flow, soft boundaries, surface for…
Capillary-lubrication force between rotating cylinders separated by a fluid interface
Aditya Jha, Yacine Amarouchene, Thomas Salez
Two cylinders rotating next to each other generate a large hydrodynamic force if the intermediate space is filled with a viscous fluid. Herein, we explore the case where the cylind…
Plateau-Rayleigh instability of a viscous film on a soft fiber
Bharti Bharti, Andreas Carlson, Tak Shing Chan +1
We theoretically study the Plateau-Rayleigh instability of a thin viscous film covering a fiber consisting of a rigid cylindrical core coated with a thin compressible elastic layer…
Measurement of the depth-dependent local dynamics in thin polymer films through rejuvenation of ultrastable glasses
Saba Karimi, Junjie Yin, Thomas Salez +1
We measure the isothermal rejuvenation of stable glass films of poly(styrene) and poly(methylmethacrylate). We demonstrate that the propagation of the front responsible for the tra…
Sieving and clogging in PEG-PEGDA hydrogel membranes
Malak Alaa Eddine, Alain Carvalho, M. Schmutz +5
Hydrogels are promising systems for separation applications due to their structural characteristics (i.e. hydrophilicity and porosity). In our study, we investigate the permeation…
Coalescence of elastic blisters filled with a viscous fluid
Torstein Sæter, Christian Pedersen, Jacco H. Snoeijer +2
Pockets of viscous fluid coalescing beneath an elastic plate are encountered in a wide range of natural phenomena and engineering processes, spanning across scales. As the pockets…
Unsteady drag force on an immersed sphere oscillating near a wall
Zaicheng Zhang, Vincent Bertin, Martin Essink +6
The unsteady hydrodynamic drag exerted on an oscillating sphere near a planar wall is addressed experimentally, theoretically, and numerically. The experiments are performed by usi…
Instability and rupture of sheared viscous liquid nanofilms
Vira Dhaliwal, Christian Pedersen, Kheireddine Kadri +5
Liquid nanofilms are ubiquitous in nature and technology, and their equilibrium and out-of-equilibrium dynamics are key to a multitude of phenomena and processes. We numerically st…
Capillary-lubrication force exerted on a 2D particle moving towards a fluid interface
Aditya Jha, Yacine Amarouchene, Thomas Salez
A rigid object moving in a viscous fluid and in close proximity with an elastic wall experiences self-generated elastohydrodynamic interactions. This has been the subject of an int…
Mechanical response of a thick poroelastic gel in contactless colloidal-probe rheology
Caroline Kopecz-Muller, Vincent Bertin, Elie Raphael +2
When a rigid object approaches a soft material in a viscous fluid, hydrodynamic stresses arise in the lubricated contact region and deform the soft material. The elastic deformatio…
On the bridge hypothesis in the glass transition of freestanding polymer films
Haggai Bonneau, Maxence Arutkin, Rainni Chen +3
Freestanding thin polymer films with high molecular weights exhibit an anomalous decrease in the glass-transition temperature with film thickness. Specifically, in such materials,…
Surface and Bulk Relaxation of Vapour-Deposited Polystyrene Glasses
Junjie Yin, Christian Pedersen, Michael Thees +3
We have studied the liquid-like response of the surface of vapour-deposited glassy films of polystyrene to the introduction of gold nanoparticles on the surface. The build-up of po…
Numerical simulations of confined Brownian-yet-non-Gaussian motion
Elodie Millan, Maxime Lavaud, Yacine Amarouchene +1
Brownian motion is a central scientific paradigm. Recently, due to increasing efforts and interests towards miniaturization and small-scale physics or biology, the effects of confi…
Large and non-linear permeability amplification with polymeric additives in hydrogel membranes
Malak Alaa Eddine, S. Belbekhouche, Sixtine de Chateauneuf-Randon +4
Hydrogels which are hydrophilic and porous materials have recently emerged as promising systems for filtration applications. In our study, we prepare hydrogel membranes by the phot…
Near-critical spreading of droplets
Raphael Saiseau, Christian Pedersen, Anwar Benjana +4
We study the spreading of droplets in a near-critical phase-separated liquid mixture, using a combination of experiments, lubrication theory and finite-element numerical simulation…
Lift at low Reynolds number
Lionel Bureau, Gwennou Coupier, Thomas Salez
Lift forces are widespread in hydrodynamics. These are typically observed for big and fast objects, and are often associated with a combination of fluid inertia (i.e. large Reynold…