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Modeling and Optimization of Y-Type Micromixers

Department of Theoretical Mechanics, Novosibirsk State University of Civil Engineering, Leningradskaya 113, 630008 Novosibirsk, Russia
Department of Thermophysics, Siberian Federal University, Kirensky 26, 660074 Krasnoyarsk, Russia
Author to whom correspondence should be addressed.
Micromachines 2014, 5(4), 886-912;
Received: 29 August 2014 / Revised: 24 September 2014 / Accepted: 26 September 2014 / Published: 20 October 2014
(This article belongs to the Special Issue Micromixer & Micromixing)


A trend in the global technological progress in the last few decades is the development of microsystem technology, microelectromechanical systems and corresponding technologies. Fluid mixing is an extremely important process widely used in various microfluidic devices (chemical microreactors, chemical and biological analyzers, drug delivery systems, etc.). To increase the mixing rate, it is necessary to use special devices: micromixers. This paper presents the results of a hydrodynamic simulation of Y-shaped micromixers. Flows are analyzed for both low and moderate Reynolds numbers. The passive and active mixers are considered. The dependence of the mixing efficiency on the Reynolds and Péclet numbers, as well as the possibility of using the hydrophobic and ultra-hydrophobic coatings is analyzed. Five different flow regimes were identified: (1) stationary vortex-free flow (Re < 5); (2) stationary symmetric vortex flow with two horseshoe vortices (5 < Re < 150); (3) stationary asymmetric vortex flow (150 < Re < 240); (4) non-stationary periodic flow (240 < Re < 400); and (5) stochastic flow (Re > 400). The maximum mixing efficiency was obtained for stationary asymmetric vortex flow. View Full-Text
Keywords: micromixers; microflow; mixing; CFD; micro-particle image velocimetry (micro-PIV); droplets; volume of fluid (VOF) micromixers; microflow; mixing; CFD; micro-particle image velocimetry (micro-PIV); droplets; volume of fluid (VOF)

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Rudyak, V.; Minakov, A. Modeling and Optimization of Y-Type Micromixers. Micromachines 2014, 5, 886-912.

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