# Plane Poiseuille Flow of Two Superposed Fluids

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This Demonstration analyzes plane Poiseuille flow of two superposed fluids. For a specified channel, the rectilinear flow field is defined by four parameters: two viscosities and and two volumetric flow rates and . Conservation of mass then determines the location of the liquid-liquid interface in the channel, which can be expressed as a thickness ratio .

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Contributed by: Brian G. Higgins and Housam Binous (January 2013)

Open content licensed under CC BY-NC-SA

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Reference

[1] S. G. Yiantsios and B. G. Higgins, "Linear Stability of Plane Poiseuille Flow of Two Superposed Fluids," *Physics of Fluids*, 31(11), 1988 pp. 3225–3238. doi:10.1063/1.866933.

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