抄録
Miniaturized biochemical analysis systems, so-called a μTAS, have gained considerable interest for research and development in new-bio-engineering. However, there is a difficulty in mixing fluids in the micro device because of extremely low Reynolds number. So, to develop an effective micromixer which can fully perform at low Reynolds number flow is important to realize integrated μTAS. In our previous experiment based on flow visualization technique, it was found that the diffusion phenomena of two species must play an important role in mixing process in such a creeping flow. The effect of diffusion should be investigated in detail to evaluate the performance of passive mixer. In this paper, we make a numerical study on the suitable flow condition for μTAS and the diffusion characteristics of passive mixer by means of curvilinear coordinate transformation technique.
