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We study universality in the kinetics of spinodal phase separation inunstable thin liquid films, via simulations of the thin film equation. It isshown that in addition to morphology and free energy,the number density oflocal maxima in the film profile can also be used to identify the early,intermediate and late stages of spinodal phase separation. A universal curvebetween the number density of local maxima and rescaled time describes thekinetics of early stage in d = 2, 3. The Lifshitz-Slyozov exponent of -1/3describes the kinetics of the late stage in d = 2 even in the absence ofcoexisting equilibrium phases.

Kinetics of Spinodal Phase Separation in Unstable Thin Liquid Films