This study focused on the diffusion and mixing phenomena investigated by using luminol chemiluminescence (CL) to estimate the local chemical reaction rate in the T-junction microchannel. Generally, the degree of mixing in microchannel is calculated by the deviation of the obtained concentration profiles from the uniform concentration profile by using fluorescence technique. Thus, the degree of mixing is a macroscopic estimate for the whole microchannel, which is inappropriate for understanding the diffusion and mixing phenomena in the mixing layer. In this study, the luminol CL reaction is applied to visualize the local chemical reaction and to estimate the local diffusion and mixing phenomena at an interface between two liquids in microchannel. Luminol emits blue chemiluminescence when it reacts with the hydrogen peroxide at the mixing layer. Experiments were carried out on the T-junction microchannel with 200 microns in width and 50 microns in depth casted in the PDMS chip. The chemiluminescence intensity profiles clearly show the mixing layer at an interface between two liquids. The experimental results are compared with the results of numerical simulation that involves solving the mass transport equations including the chemical reaction term. By calibrating CL intensity to the chemical reaction rate estimated by the numerical simulation, the local chemical reaction profile can be quantitatively estimated from the CL intensity profile.
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ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
June 16–19, 2013
Sapporo, Japan
Conference Sponsors:
- Fluids Engineering Division
- Heat Transfer Division
ISBN:
978-0-7918-5559-1
PROCEEDINGS PAPER
Diffusion and Mixing in Microchannel Analyzed by the Luminol Chemiluminescence Available to Purchase
Ruru Matsuo,
Ruru Matsuo
Kansai University, Suita, Osaka, Japan
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Ryosuke Matsumoto
Ryosuke Matsumoto
Kansai University, Suita, Osaka, Japan
Search for other works by this author on:
Ruru Matsuo
Kansai University, Suita, Osaka, Japan
Ryosuke Matsumoto
Kansai University, Suita, Osaka, Japan
Paper No:
ICNMM2013-73113, V001T14A001; 9 pages
Published Online:
December 4, 2013
Citation
Matsuo, R, & Matsumoto, R. "Diffusion and Mixing in Microchannel Analyzed by the Luminol Chemiluminescence." Proceedings of the ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels. Sapporo, Japan. June 16–19, 2013. V001T14A001. ASME. https://doi.org/10.1115/ICNMM2013-73113
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