Micelle fragmentation and wetting in confined flow

Hydrodynamically Confined Flow Devices

Imbibition and Flow of Wetting Liquids in Noncircular Capillaries

Micromolding in capillaries (MIMIC) has been used to study the dynamics of imbibition of liquid prepolymers in micrometer-scale, rectangular capillaries formed between an elastomer containing relief structures and a self-assembled monolayer (SAM) of alkanethiolates on gold supported on Si/SiO2. Self-assembled monolayers provide a wide range of solid/vapor interfacial free energies (γSV) and a c...

Confined flow of polymer blends.

The influence of confinement on the steady-state morphology of two different emulsions is investigated. The blends, made from polybutene (PB) in polydimethylsiloxane (PDMS) and polybutadiene (PBD) in PDMS, are sheared between two parallel plates, mostly with a standard gap spacing of 40 microm, in the range of shear rates at which the transition from "bulk" behavior toward "confined" behavior i...

Layering instability in a confined suspension flow.

We show [J. Fluid Mech. 592, 447 (2007)] that swapping (reversing) trajectories in confined suspension flows prevent collisions between particles approaching each other in adjacent streamlines. Here we demonstrate that by inducing layering this hydrodynamic mechanism changes the microstructure of suspensions in a confined Couette flow. Layers occur either in the near-wall regions or span the wh...

Quasi-wetting and morphological phase transitions in confined far-from-equilibrium magnetic thin films

The growth of confined magnetic films with ferromagnetic interactions between nearest-neighbor spins is studied in a stripped (1 + 1)−dimensional rectangular geometry. Magnetic films are grown irreversibly by adding spins at the boundaries of the growing interface. A competing situation with two opposite short range surface magnetic fields of the same magnitude is analyzed. Due to the antisymme...