Effect of surfactant on the stability of film flow down an inclined plane

M.G. Blyth, C. Pozrikidis

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The effect of an insoluble surfactant on the stability of the gravity-driven flow of a liquid film down an inclined plane is investigated by a normal-mode analysis. Numerical solutions of the Orr–Sommerfeld equation reveal the occurrence of a stable Marangoni mode and a possibly unstable Yih mode, and demonstrate that the primary role of the surfactant is effectively to raise the critical Reynolds number at which instability is first encountered.
Original languageEnglish
Pages (from-to)241-250
Number of pages10
JournalJournal of Fluid Mechanics
Publication statusPublished - 2004

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