The passive mixing of water and alcohol, as two fluids with different densities, is carried out computationally in three-dimensional microchannels. Four designs of microchannels are considered to investigate the efficiency of mixing for Reynolds numbers ranging between 6 and 96. In a straight-type microchannel, mixing is very poor. In a square-wave-type microchannel, mixing is marginally better than the straight one. Mixing in the serpentine-type and twisted-type microchannels develops considerable better than the first two microchannels, especially at higher Reynolds numbers. However, in the twisted microchannel, the mixing index is substantially larger compared to the serpentine microchannel for the Reynolds number of 35. The higher mixing index implies the occurrence of spatially chaotic flows with a higher degree of chaos compared to the case of the serpentine microchannel. The results are compared quantitatively and qualitatively in Eulerian and Lagrangian frameworks and a correlation between Lagrangian chaos and Eulerian chaos is concluded.
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ASME 2003 International Mechanical Engineering Congress and Exposition
November 15–21, 2003
Washington, DC, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3716-5
PROCEEDINGS PAPER
A Computational Study on Mixing of Two-Phase Flow in Microchannels
Farshid Bondar,
Farshid Bondar
Iowa State University, Ames, IA
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Francine Battaglia
Francine Battaglia
Iowa State University, Ames, IA
Search for other works by this author on:
Farshid Bondar
Iowa State University, Ames, IA
Francine Battaglia
Iowa State University, Ames, IA
Paper No:
IMECE2003-43957, pp. 101-109; 9 pages
Published Online:
May 12, 2008
Citation
Bondar, F, & Battaglia, F. "A Computational Study on Mixing of Two-Phase Flow in Microchannels." Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition. Fluids Engineering. Washington, DC, USA. November 15–21, 2003. pp. 101-109. ASME. https://doi.org/10.1115/IMECE2003-43957
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