Study of concentric, eccentric and split type magnetic membrane micro-mixers
| Autor: | Ze Ting Yeo, Yong-Jin Yoon, Say Hwa Tan, Shao Qiang Tang, Sum Huan Ng, Wei Xuan Chan, King Ho Holden Li |
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| Přispěvatelé: | School of Mechanical and Aerospace Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Microfluidics 02 engineering and technology Concentric 01 natural sciences chemistry.chemical_compound Micro-mixers Fluid dynamics Eccentric Electrical and Electronic Engineering Composite material Polydimethylsiloxane 010401 analytical chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Electronic Optical and Magnetic Materials Magnetic field Membrane chemistry lcsh:TA1-2040 Magnet Signal Processing Magnetic Membrane lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Biotechnology |
| Zdroj: | Sensing and Bio-Sensing Research, Vol 19, Iss, Pp 14-23 (2018) |
| Popis: | Electromagnetically driven elastic magnetic microfluidic mixers were investigated for their performance in air, water and glycerol filled chambers. They were fabricated by embedding flexible magnets in polydimethylsiloxane (PDMS) membrane. At a driving frequency of 100 Hz, oscillating fluid flow was induced and mixing was achieved. Three designs were fabricated and studied: a) concentric type with the magnetic material in the center of the membrane, b) eccentric type with the magnetic material offset from the center of the membrane and c) split type with two regions of magnetic materials with opposing polarities. The split configuration provides additional fluid folding, facilitating mixing of the 20 μL fluorescent dye in 60 μL of solvent. Simulation and experimental results show that the eccentric and split designs were able to achieve a 20–30% reduction in mixing time compared to the concentric design. At the same magnetic flux density, the eccentric type design exhibited the greatest deflection, explaining the better mixing achieved over the concentric type design. The split type design, having the lowest deflection, was able to perform better and more consistently than the eccentric type design by creating a “micro rocker mixer” effect. We postulated that the shapes of the deflection profiles in the eccentric and split designs contributed to the mixing efficiency by promoting better chaotic advection than the concentric design. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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