Droplet breakup in shear and elongation dominated flows in microfluidic devices

Shelley L. Anna, Gordon F. Christopher, Nadia Noharuddin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microfluidic devices have recently been demonstrated as an effective platform for generating monodisperse drops and bubbles, which is important for applications from emulsification to drug delivery and lab on a chip. Here we compare drop formation mechanisms in microfluidic devices in which flows can be either predominantly shear flows, or predominantly elongational flows. In either case, drops of an aqueous liquid form due to viscous stresses imposed by a second oil phase. We show that the two flow types lead to dramatically different ability to control droplet sizes. We characterize the drop size over a large number of experiments by varying capillary number, volume fraction, and viscosity ratio. We observe distinct breakup modes depending on these three dimensionless parameters, and the flow type.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS
Pages669-671
Number of pages3
DOIs
StatePublished - 2005
Event2005 ASME International Mecahnical Engineering Congress and Exposition, IMECE 2005 - Orlando, FL, United States
Duration: Nov 5 2005Nov 11 2005

Publication series

NameAmerican Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS
Volume7 MEMS
ISSN (Print)1096-665X

Conference

Conference2005 ASME International Mecahnical Engineering Congress and Exposition, IMECE 2005
CountryUnited States
CityOrlando, FL
Period11/5/0511/11/05

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    Anna, S. L., Christopher, G. F., & Noharuddin, N. (2005). Droplet breakup in shear and elongation dominated flows in microfluidic devices. In American Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS (pp. 669-671). (American Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS; Vol. 7 MEMS). https://doi.org/10.1115/IMECE2005-80625