Swelling/shrinkage induced by shear in narrow pores

Hai Hoang (1) , Guillaume Galliero (1)

1 LFCR - Laboratoire des Fluides Complexes et leurs Réservoirs

In this work, using molecular dynamics simulations, we have explored the swelling/shrinkage of a simple slit nano-pore immerged in a Lennard-Jones liquid reservoir induced by shear. It is shown that the pore can swell or shrink when the solid walls are displaced in a direction parallel to the fluid-solid interface. This is due to the fact that the normal pressure of the confined fluid appreciably varies with the relative structural ordering between the solid (crystalline) surfaces for a given pore size. Thus, when the solid walls are moved at a constant velocity, the instantaneous pore size oscillates with time and yields, on average, a shear-induced swelling/shrinkag

Mots clés: Confined fluids; Constant velocities; Fluid-solid interfaces; Lennard-Jones liquids; Molecular dynamics simulations; Normal pressure; Structural ordering

Domaines: Chimie-Physique [physics.chem-ph]

Hai Hoang, Guillaume Galliero. Swelling/shrinkage induced by shear in narrow pores. 5th Biot Conference on Poromechanics, BIOT 2013, Jul 2013, Vienne, Austria. pp.685-692, ⟨10.1061/9780784412992.081⟩. ⟨hal-00992291⟩