Soft disks in a narrow channel

Autor(en)

D Mukamel, Harald Posch

Abstrakt

The pressure components of `soft' disks in a two-dimensional narrow channel are analyzed in the dilute gas regime using the Mayer cluster expansion and molecular dynamics. Channels with either periodic or reflecting boundaries are considered. It is found that when the two-body potential, u(r), is singular at some distance r0, the dependence of the pressure components on the channel width exhibits a singularity at one or more channel widths which are simply related to r0. In channels with periodic boundary conditions and for potentials which are discontinuous at r0, the transverse and longitudinal pressure components exhibit a 1/2 and a 3/2 singularity, respectively. Continuous potentials with a power-law singularity result in weaker singularities of the pressure components. For channels with reflecting boundary conditions the singularities are found to be weaker than those corresponding to periodic boundaries.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Weizmann Institute of Science

Journal

Journal of Statistical Mechanics: Theory and Experiment

Band

2009

Anzahl der Seiten

25

DOI

https://doi.org/10.1088/1742-5468/2009/03/P03014

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7014b68c-4b33-4670-9501-2c5ec999ff97