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

  • M. G. BLYTH (a1) and C. POZRIKIDIS (a2)

Abstract

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.

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

  • M. G. BLYTH (a1) and C. POZRIKIDIS (a2)

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