Capillary-based microfluidics-coflow, flow-focusing, electro-coflow, drops, 
jets, and instabilities

Guerrero, J.; Chang, Y. W.; Fragkopoulos, Alexandros A.; Fernandez-Nieves, A.

doi:10.1002/smll.201904344

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Capillary-based microfluidics-coflow, flow-focusing, electro-coflow, drops, jets, and instabilities

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Fragkopoulos, Alexandros A.
Group Collective phenomena far from equilibrium, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Guerrero, J., Chang, Y. W., Fragkopoulos, A. A., & Fernandez-Nieves, A. (2019). Capillary-based microfluidics-coflow, flow-focusing, electro-coflow, drops, jets, and instabilities. Small, 2019: 1904344. doi:10.1002/smll.201904344.

Cite as: http://hdl.handle.net/21.11116/0000-0005-19B2-6

Abstract

Capillary-based microfluidics is a great technique to produce monodisperse and complex emulsions and particulate suspensions. In this review, the current understanding of drop and jet formation in capillary-based microfluidic devices for two primary flow configurations, coflow and flow-focusing is summarized. The experimental and theoretical description of fluid instabilities is discussed and conditions for controlled drop breakup in different modes of drop generation are provided. Current challenges in drop breakup with low interfacial tension systems and recent progress in overcoming drop size limitations using electro-coflow are addressed. In each scenario, the physical mechanisms for drop breakup are revisited, and simple scaling arguments proposed in the literature are introduced.