Solid-Solid Transition in Landau-Levich Flow with Soft-Jammed Systems

M Maillard (1) , J Boujlel (2) , Philippe Coussot (1)

1 Physique des milieux poreux
2 navier umr 8205 - Laboratoire Navier

We study the Landau-Levich problem, i.e., withdrawal of a plate from a bath of fluid, in the case of a soft-jammed system, which involves a transition from a solid bath to a solid layer stuck on the plate. We show that this solid-solid transition is prepared inside the bath before the emersion from the fluid, through the existence of a uniform (boundary) layer in the liquid regime along the plate. This layer controls the original characteristics of the (solid) coated layer, whose thickness is almost independent of the velocity but proportional to the material yield stress.

Keywords: yield stress fluids; dip-coating

Domains: Materials Science [cond-mat.mtrl-sci]; Soft Condensed Matter [cond-mat.soft]; Fluid mechanics [physics.class-ph]

M Maillard, J Boujlel, Philippe Coussot. Solid-Solid Transition in Landau-Levich Flow with Soft-Jammed Systems. Physical Review Letters, 2014, 112, pp.068304. ⟨10.1103/PhysRevLett.112.068304⟩. ⟨hal-01117227⟩