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Title of Journal: Microsyst Technol

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Abbravation: Microsystem Technologies

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Springer Berlin Heidelberg

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DOI

10.1002/zaac.201000202

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1432-1858

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Analysis and testing of a contractionandexpansio

Authors: Ender Yıldırım
Publish Date: 2017/01/24
Volume: 23, Issue: 10, Pages: 4797-4804
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Abstract

In this paper numerical analysis and experimental investigation of a micromixer which was specifically designed for microfluidic devices fabricated by micromilling is presented The mixer is composed of series of contractions and expansions in zigzag arrangement along a mixing channel Mixers fabricated by micromilling on polymethylmethacrylate PMMA were tested with 01 Ponceau 4R red food dye solution and distilled water According to experiment results over 70 mixing efficiency could be obtained for the flows with Reynolds number Re greater than 40 It was also numerically shown that by increasing the number of successive contractions and expansions it could be possible to achieve over 80 mixing efficiency when Re = 55 for the species with diffusion coefficient of 5 × 10−9 m2/s Although the micromixer was specifically designed for micromilling it is expected that the mixer can be useful in any microfluidic device fabricated by any other techniqueThis work was supported by The Scientific and Technological Research Council of Turkey TUBITAK under Grant Number 114E098 The author thanks Middle East Technical University for the computational facilities and Ferah Cogun for the fabrication of the micromixers

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