Lennard--Jones and Lattice Models of Driven Fluids

TL;DR

This paper introduces a continuous off-lattice Lennard-Jones model for driven fluids, compares it with lattice models, and discusses implications for understanding nonequilibrium anisotropic phase transitions.

Contribution

It presents a novel off-lattice Lennard-Jones model for driven fluids and compares it to lattice models to clarify their differences and limitations.

Findings

Off-lattice model reveals more realistic fluid behavior.

Comparison highlights limitations of lattice models.

Insights into anisotropic phase transition mechanisms.

Abstract

We introduce a nonequilibrium off--lattice model for anisotropic phenomena in fluids. This is a Lennard--Jones generalization of the driven lattice--gas model in which the particles' spatial coordinates vary continuously. A comparison between the two models allows us to discuss some exceptional, hardly realistic features of the original discrete system --which has been considered a prototype for nonequilibrium anisotropic phase transitions. We thus help to clarify open issues, and discuss on the implications of our observations for future investigation of anisotropic phase transitions.