Abstrect . Phase separatLQns in films of liquidb [ nary mix ヒures are studied numerical [ y from the view point of fluid dynamics . The 皿odel of this study is the two − phase shallow water equations withdriving forces ofphase separations based onGinzburg −Landaumodel . Numerical experiments are performed to investiga 仁e the effects of the volu 皿 e fraction on phase separations . Phase separations in the early stage are studied by a new equation derived from the two − phase shallow water

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... エs . Irl the late stage , it is shown that viscous flows play an important role . Differences on phase separations be ヒ ween f皇 ows and diffusion processes are d 正scussed