Micro scale fluid control or mixing is critical for chemistry and life sciences. Successful performance of on-chip biochemical analysis processes, such as DNA hybridization and PCR amplification, highly depend on rapid mixing of multiple fluid species. In this paper, a set of initial designs is developed for flow mixing. In micro channels with 100 and 200μm width, alternating regions of hydrophobic/hydrophilic surface are created on silicon surfaces by photolithography and dry etch techniques. Experimental results show that in the micro channels with 20mm length, effective mixing is observed on the device patterned by incline hydrophobic/hydrophilic grilles in which eddy diffusion mixes two liquids. In contrasts, slight mixing is caused by the development of liquid instability induced by alternating hydrophobic/hydrophilic patterns orthogonal to the flow direction.
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ASME 2006 International Mechanical Engineering Congress and
Exposition
November 5–10, 2006
Chicago, Illinois, USA
Conference Sponsors:
- Microelectromechanical Systems Division
ISBN:
0-7918-4775-6
PROCEEDINGS PAPER
Fluid Mixing in Micro Scale Channel Patterned Hydrophobic/Hydrophilic Surface
Chung-Lung Chen
Chung-Lung Chen
Rockwell Scientific Company
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Qingjun Cai
Rockwell Scientific Company
Chialun Tsai
Rockwell Scientific Company
Jeff DeNatale
Rockwell Scientific Company
Chung-Lung Chen
Rockwell Scientific Company
Paper No:
IMECE2006-13739, pp. 27-31; 5 pages
Published Online:
December 14, 2007
Citation
Cai, Q, Tsai, C, DeNatale, J, & Chen, C. "Fluid Mixing in Micro Scale Channel Patterned Hydrophobic/Hydrophilic Surface." Proceedings of the ASME 2006 International Mechanical Engineering Congress and Exposition. Microelectromechanical Systems. Chicago, Illinois, USA. November 5–10, 2006. pp. 27-31. ASME. https://doi.org/10.1115/IMECE2006-13739
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