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A Microfluidic Rectifier: Anisotropic Flow Resistance at Low Reynolds Numbers
Abstract
It is one of the basic concepts of Newtonian fluid dynamics that at low Reynolds number (Re) the Navier-Stokes equation is linear and flows are reversible. In microfluidic devices, where Re is essentially always low, this implies that flow resistance in microchannels is isotropic. Here we present a microfluidic rectifier: a microscopic channel of a special shape whose flow resistance is strongly anisotropic, differing by up to a factor of 2 for opposite flow directions. Its nonlinear operation at arbitrary small Re is due to non-Newtonian elastic properties of the working fluid, which is a 0.01% aqueous solution of a high molecular weight polymer. The rectifier works as a dynamic valve and may find applications in microfluidic pumps and other integrated devices.
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Cited by
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Mahmud, G., Campbell, C. J., Bishop, K. J. M., Komarova, Y. A., Chaga, O., Soh, S., Huda, S., Kandere-Grzybowska, K., & Grzybowski, B. A. (2009) · Nature Physics · doi:10.1038/nphys1306 · Cited by 329
Yang, B., Kong, J., & Fang, X. (2019) · Talanta · doi:10.1016/j.talanta.2019.06.031 · Cited by 83
Metadata
- Authors
- Groisman, A., & Quake, S. R.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2004-03-04
- Volume
- 92
- Issue
- 9
- Pages
- 094501-094501
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2028404626
- Cited by
- 202
- References
- 0
- FWCI
- 5.80
- Type
- journal article
- Language
- en
- Open access
- closed
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- Groisman, A., & Quake, S. R. (2004). A Microfluidic Rectifier: Anisotropic Flow Resistance at Low Reynolds Numbers. Physical Review Letters. https://doi.org/10.1103/physrevlett.92.094501
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