Synergetic Fluid Mixing from Viscous Fingering and Alternating Injection
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Jha-2013-Synergetic fluid mixing.pdf
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Author(s)
Jha, Birendra
Cueto-Felgueroso, Luis
Juanes, Ruben
Date Issued
October 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Jha, Birendra, Luis Cueto-Felgueroso, and Ruben Juanes. “Synergetic Fluid Mixing from Viscous Fingering and Alternating Injection.” Physical Review Letters 111, no. 14 (October 2013). © 2013 American Physical Society
Version
Final published version
Abstract
We study mixing of two fluids of different viscosity in a microfluidic channel or porous medium. We show that the synergetic action of alternating injection and viscous fingering leads to a dramatic increase in mixing efficiency at high Péclet numbers. Based on observations from high-resolution simulations, we develop a theoretical model of mixing efficiency that combines a hyperbolic mixing model of the channelized region ahead and a mixing-dissipation model of the pseudosteady region behind. Our macroscopic model quantitatively reproduces the evolution of the average degree of mixing along the flow direction and can be used as a design tool to optimize mixing from viscous fingering in a microfluidic channel.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.144501
