Phys. Rev. Lett. 87, 274501 (2001) [4 pages]Perfectly Monodisperse Microbubbling by Capillary Flow Focusing
See accompanying Physics Focus Here we report a simple microfluidics phenomenon which allows the efficient mass production of micron size gas bubbles with a perfectly monodisperse and controllable diameter. It resorts on a self-excited breakup phenomenon (which locks at a certain frequency) of a short gas microligament coflowing in a focused liquid stream. In this work, we describe the physics of the phenomenon and obtain closed expressions for the bubble diameter as a function of the liquid and gas properties, geometry, and flow parameters, from a large set of experimental results. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.274501
DOI:
10.1103/PhysRevLett.87.274501
PACS:
47.55.Dz, 47.15.Hg, 47.60.+i, 47.27.Wg
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