Consideration of obstacles number in designing passive micromixer for laminar mixing flow
Micromixer can be divided into two categories which are active micromixer and passive micromixer. Due to simple fabrication technology and easy implementation in a complex microfluidic system, obstacle based passive micromixer will be the focus in this work. A passive micromixer is depends on low Re...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6143/ http://eprints.uthm.edu.my/6143/1/x_2.pdf |
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| Summary: | Micromixer can be divided into two categories which are active micromixer and passive micromixer. Due to
simple fabrication technology and easy implementation in a complex microfluidic system, obstacle based
passive micromixer will be the focus in this work. A passive micromixer is depends on low Reynolds number
and the channel geometry for mixing effectiveness. In this work, three designs of obstacle based Y-micromixer
were designed and evaluated. The micromixers are Y shape with obstacle SAR technique micromixer, Y shape
with internal rib micromixer, Y shape with zigzag obstacle micromixer, and Y shape with mirrored zigzag
obstacle micromixer. These micromixers has 237pm channel length, 30pm inlet length, 900 between inlets
ports, width and depth are 30pm each. The fluids used for mixing were blood which has 3.0 x 10-3 kglpms of
viscosity and glycerin which has high viscosity than blood (1.49 x 10-3 kglpms). The fluids used to evaluate the
differences in term of their visual performance based image's standard deviation by plotting the graph and
mixing efficiency by calculation. Based on these evaluations, the Y shape with zigzag obstacle micromixers is
the best micromixer design with the highest mixing efficiency of 100% at the outlet of the channel. |
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