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Open AccessArticle

Mixing Optimization in Grooved Serpentine Microchannels

1
Department of Physics, Cleveland State University, 2121 Euclid Avenue, Cleveland, OH 44236, USA
2
Department of Chemical and Biomedical Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, OH 44236, USA
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(1), 61; https://doi.org/10.3390/mi11010061
Received: 6 December 2019 / Revised: 29 December 2019 / Accepted: 2 January 2020 / Published: 4 January 2020
(This article belongs to the Special Issue Optimization of Microfluidic Devices)
Computational fluid dynamics modeling at Reynolds numbers ranging from 10 to 100 was used to characterize the performance of a new type of micromixer employing a serpentine channel with a grooved surface. The new topology exploits the overlap between the typical Dean flows present in curved channels due to the centrifugal forces experienced by the fluids, and the helical flows induced by slanted groove-ridge patterns with respect to the direction of the flow. The resulting flows are complex, with multiple vortices and saddle points, leading to enhanced mixing across the section of the channel. The optimization of the mixers with respect to the inner radius of curvature (Rin) of the serpentine channel identifies the designs in which the mixing index quality is both high (M > 0.95) and independent of the Reynolds number across all the values investigated. View Full-Text
Keywords: passive micromixers; Dean flows and mixers; serpentine channels; staggered herring bone (SHB) mixers; mixing index passive micromixers; Dean flows and mixers; serpentine channels; staggered herring bone (SHB) mixers; mixing index
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MDPI and ACS Style

Rhoades, T.; Kothapalli, C.R.; Fodor, P.S. Mixing Optimization in Grooved Serpentine Microchannels. Micromachines 2020, 11, 61.

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