Structure and growth of the cluster in gas–liquid transition of two-dimensional fluid

Molecular dynamics simulations have been performed for a two-dimensional fluid with truncated Morse potential quenched into the two-phase region. The cluster size and shape were used to study the domain growth and structure. The power-law growth of the characteristic length scale, which was calculated through the mean cluster size, i.e., l∼ta with a=12 and 13, was observed in the late stage. The fractal dimension was obtained from the scaling relationship of the gyration radius of the clusters with the cluster numbers. The structure factors showed scaling relationship when scaled with the characteristic length. It is also found that the domain structures are sensitive to temperature, and the thermal noise influences the growth exponent for the dilute system.