LATTICE-GAS WITH INTERACTION POTENTIAL

We present an extension of a simple automaton model to incorporate non local interactions extending over a spatial range in lattice gases. Fr om the viewpoint of statistical mechanics, the lattice gas with intera ction range may serve as a prototype for non-ideal-gas behavior. From the density fluctuations correlation function, we obtain a quantity wh ich is identified as a potential of mean force. Equilibrium and transp ort properties are computed theoretically and by numerical simulations to establish the validity of the model at macroscropic scale.