Microfluidic analog of an opposed-jets device

S. J. Haward, C. C. Hopkins, K. Toda-Peters, A. Q. Shen

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A fully three-dimensional (3D) stagnation point microfluidic device is fabricated that, similar to the classical opposed-jet apparatus, can be operated in either a uniaxial or a biaxial extensional flow mode with an easily controllable strain rate. The microchannel is etched inside fused silica and has optical access through all three planes. A detailed characterization of the Newtonian flow field by microparticle image velocimetry confirms the expected nature of the flow and compares well with the prediction of 3D numerical simulations. Flow-induced birefringence of a model polymer solution demonstrates the extension of macromolecules in both modes of operation and the potential use of the device for quantitative rheo-optical studies. This microfluidic opposed jet device could also be used for examining the deformation and dynamics of drops, cells, fibers, and single molecules in well-defined and relevant flow fields.

Original languageEnglish (US)
Article number223701
JournalApplied Physics Letters
Issue number22
StatePublished - Jun 3 2019

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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