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Open AccessArticle

Asymmetrical Split-and-Recombine Micromixer with Baffles

Department of Mechanical Engineering, Inha University, Incheon 22212, Korea
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Author to whom correspondence should be addressed.
Micromachines 2019, 10(12), 844; https://doi.org/10.3390/mi10120844
Received: 22 November 2019 / Revised: 1 December 2019 / Accepted: 2 December 2019 / Published: 3 December 2019
(This article belongs to the Special Issue Optimization of Microfluidic Devices)
The present work proposes a planar micromixer design comprising hybrid mixing modules of split-and-recombine units and curved channels with radial baffles. The mixing performance was evaluated numerically by solving the continuity and momentum equations along with the advection-diffusion equation in a Reynolds number range of 0.1–80. The variance of the concentration of the mixed species was considered to quantify the mixing index. The micromixer showed far better mixing performance over whole Reynolds number range than an earlier split-and-recombine micromixer. The mixer achieved mixing indices greater than 90% at Re ≥ 20 and a mixing index of 99.8% at Re = 80. The response of the mixing quality to the change of three geometrical parameters was also studied. A mixing index over 80% was achieved within 63% of the full length at Re = 20.
Keywords: micromixers; unbalanced split-and-recombination; baffles; Navier–Stokes equations; parametric study; mixing index micromixers; unbalanced split-and-recombination; baffles; Navier–Stokes equations; parametric study; mixing index
MDPI and ACS Style

Raza, W.; Kim, K.-Y. Asymmetrical Split-and-Recombine Micromixer with Baffles. Micromachines 2019, 10, 844.

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