Abstract
The target of this study is to demonstrate the mixing ability of an alternate pumping microreactor. We adopt visualization of the dilution of methylene blue solution with water in microreactors. The captured image presents the distribution of the brightness in the channel. According to the relation between the concentration of methylene blue and the brightness, the obtained brightness distribution gives the concentration field in the channel. The obtained concentration fields in the alternate pumping microreactor and an ordinary microreactor illustrate that the mixing region spreads in the whole area of the channel in the alternate pumping reactor and the mixing region area in the ordinary reactor is limited in the narrow area at the channel center.
