Mixing Performance of Passive Micromixer with Sinusoidal Channel Walls
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- Afzal Arshad
- Department of Mechanical Engineering, Inha University
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- Kim Kwang-Yong
- Department of Mechanical Engineering, Inha University
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A passive micromixer with wavy channel walls with a sinusoidal variation is proposed, and numerical simulations based on Navier–Stokes equations are carried out for Reynolds numbers (Re) from 0.1≤Re≤30. Ethanol and water are used as the working fluids for mixing. A mixing index is employed to evaluate the performance of the micromixer. A different realization of chaotic mixing based on Dean vortices is observed with a shift in the center of rotation toward the inner sinusoidal wall for lower-wavelength mixers. The mixing index is found to sensitively increase as the wavelength of the sinusoidal channel walls decreases over the entire Re range considered. A parametric study is also carried out with the amplitude, offset-y, and number of cycles as the geometrical parameters. Specifically, Re=1 and 30 are chosen to demarcate the effects of these parameters in terms of the mixing performance for diffusion- (Re≤1) and recirculation- (Re≥10) dominated regimes. The amplitude turns out to be an important parameter that significantly affects the mixing performance. The proposed sinusoidal micromixer shows much better mixing performance than square-wave and zigzag micromixers for the same wavelength. The proposed micromixer can easily be realized and integrated with microfluidic systems such as lab-on-a-chip and micro-total analysis systems (µ-TAS) because of its simple in-plane structure.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 46 (3), 230-238, 2013
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679545579776
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- NII論文ID
- 10031159969
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- NII書誌ID
- AA00709658
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- COI
- 1:CAS:528:DC%2BC3sXmsVGitrg%3D
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- ISSN
- 18811299
- 00219592
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- NDL書誌ID
- 024358045
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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