title: Lennard-Jones and lattice models of driven fluids.
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.
authors.affiliation: Institute Carlos I for Theoretical and Computational Physics, and Departamento de Electromagnetismo y Física de la Materia, Universidad de Granada, E-18071, Granada, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Díez-Minguito
authors.forename: P L
authors.initials: PL
authors.lastname: Garrido
authors.forename: J
authors.initials: J
authors.lastname: Marro