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A microscopic model for thin film spreading

Douglas B. Abraham, Rodolfo Cuerno, Esteban Moro

cond-mat.stat-mecharXiv:cond-mat/0201218

Abstract

A microscopic, driven lattice gas model is proposed for the dynamics and spatio-temporal fluctuations of the precursor film observed in spreading experiments. Matter is transported both by holes and particles, and the distribution of each can be described by driven diffusion with a moving boundary. This picture leads to a stochastic partial differential equation for the shape of the boundary, which agrees with the simulations of the lattice gas. Preliminary results for flow in a thermal gradient are discussed.

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