# Dresden 2009 – wissenschaftliches Programm

## Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

# CPP: Fachverband Chemische Physik und Polymerphysik

## CPP 17: Confined Fluids

### CPP 17.4: Vortrag

### Dienstag, 24. März 2009, 10:15–10:30, ZEU 160

**Molecular dynamics simulation of evaporation processes of fluid bridges confined in slit-like pore** — •Katarzyna Bucior, Leonid Yelash, and Kurt Binder — Institute of Physics, Johannes-Gutenberg University of Mainz, Mainz, Germany

We study a simple fluid, described by point-like particles interacting via
the Lennard-Jones potential, under confinement in a
slit geometry between two walls at distance *L*_{z} apart for
densities inside the vapor-liquid coexistence curve. Equilibrium
then requires the coexistence of a liquid “bridge” between the two
walls, and vapor in the remaining pore volume.
We study this equilibrium for several choices of the wall-fluid interaction
(corresponding to the full range from complete wetting to complete
drying, for a macroscopically thick film), and consider also the
kinetics of state changes in such a system. In particular, we
study how this equilibrium is established by diffusion processes,
when a liquid is inserted into an initially empty capillary
(partial or complete evaporation into vacuum), or when the volume
available for the vapor phase increases.
We compare the diffusion constants describing the rates of these processes in such
inhomogeneous systems to the diffusion constants in the
corresponding bulk liquid and vapor phases.