Stability Criterion for Microscale Concentric Flow of Two Immiscible Liquids

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This paper addresses the establishment of a stability criterion for isothermal laminar concentric flow of two immiscible liquids. Using the approach of combined non-dimensional group anlysis and numerical simulations, it is established that the inner core liquid will be stable and maintain a thread like configuration if the capillary number exceeds unity, but it will be unstable and break up into droplets if the capillary number is below unity.

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Journal: TechConnect Briefs
Volume: Technical Proceedings of the 1999 International Conference on Modeling and Simulation of Microsystems
Published: April 19, 1999
Pages: 530 - 533
Industry sector: Sensors, MEMS, Electronics
Topicss: Informatics, Modeling & Simulation, Micro & Bio Fluidics, Lab-on-Chip
ISBN: 0-9666135-4-6