Journal of Siberian Federal University. Engineering & Technologies / Micro-Lif and Numerical investigation of Mixing in Microchannel

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Issue
Journal of Siberian Federal University. Engineering & Technologies. 2013 6 (1)
Authors
Minakov, Andrey V.; Yagodnitsyna, Anna A.; Lobasov, Alexander S.; Rudyak, Valery Ya.; Bilsky, Artur V.
Contact information
Minakov, Andrey V.: Siberian Federal University, 28 Kirensky Str., Krasnoyarsk, 660074 Russia; Institute of Thermophysics SB RAS, 1 Lavrentiev, Novosibirsk, 630090 Russia; e-mail: ; Yagodnitsyna, Anna A.: Institute of Thermophysics SB RAS, 1 Lavrentiev, Novosibirsk, 630090 Russia;; Lobasov, Alexander S.: Siberian Federal University, 28 Kirensky Str., Krasnoyarsk, 660074 Russia; Institute of Thermophysics SB RAS, 1 Lavrentiev, Novosibirsk, 630090 Russia;; Rudyak, Valery Ya.: Institute of Thermophysics SB RAS, 1 Lavrentiev, Novosibirsk, 630090 Russia; Novosibirsk State University of Civil Engineering, 113 Leningradskaya Str., 630008 Russia;; Bilsky, Artur V.: Institute of Thermophysics SB RAS, 1 Lavrentiev, Novosibirsk, 630090 Russia;
Keywords
Microflow; Micromixers; Microchannels; CFD; Micro-PIV; Micro-LIF; CFD; Micro-PIV; Micro-LIF
Abstract

Flow regimes and mixing pattern in a T-type micromixer at high Reynolds numbers were studied by numerical solution of the Navier–Stokes equations and by particle image velocimetry (micro-PIV) and laser induced fluorescence (micro-LIF) experimental measurements. The Reynolds number was varied from 1 to 1000. The cross section of the mixing channel was 200 μm×400 μm, and its length was 3000 μm. Five different flow regimes were identified: (I) steady vortex-free flow; (II) steady symmetric vortex flow with two horseshoe vortices; (III) steady asymmetric vortex flow; (IV) unsteady periodic flow; (V) stochastic flow. Maximum mixing efficiency was obtained for stationary asymmetric vortex flow. In this case, an S-shaped vortex structure formed in the flow field. Good agreement between calculation and experiment was obtained.

Pages
15-27
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/9636

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