Soft and wet is different
Orateur : Thomas Salez
CNRS // University of Bordeaux // Hokkaido University
Abstract : Soft and wet contact arises in a range of phenomena that spans many length and time scales, and includes : landslides, aquaplaning of tires, wear of industrial bearings, ageing of synovial and cartilaginous joints, cell motion in blood vessels or microfluidic devices, and atomic-force or surface-force rheology. Therein, the coupling between boundary elasticity and confined viscous flow leads to a striking zoology of counterintuitive emergent effects. From the canonical situation of a free particle that can simultaneously sediment, slide, and roll in a viscous fluid, and near a soft wall, we study [1-3] a range of novel inertial-like (despite the low-Reynolds-number flow) features, such as : enhanced sedimentation, elastohydrodynamic bouncing, roll reversal, emergent lift and torques...
[1] T. Salez and L. Mahadevan, Journal of Fluid Mechanics 779 181 (2015).
[2] B. Saintyves, T. Jules, T. Salez, and L. Mahadevan, Proceedings of the National Academy of Sciences of the USA 113 5847 (2016).
[3] B. Rallabandi, B. Saintyves, T. Jules, T. Salez, C. Schonecker, L. Mahadevan, and H. A. Stone, Physical Review Fluids 2 074102 (2017).
Date et lieu : le Vendredi 16 mars 2018 à 11h00, salle de séminaires IRPHE
Voir en ligne : la page personnelle de l’orateur