This thesis investigates Static chaos microfluid mixers for Micro Total Analysis Systems (μTAS). The present design uses microblock for generating whirling flow in microchannel. Using microblock-induced whirling flow, we propose static chaos microfluid mixers that make alternating whirling flow for generating complexities of fluid motion (AW-type). Additionally, we propose static chaos microfluid mixers that use both alternating whirl and lamination, which is dividing channel-induced fluid splitting (AWL-type).
For the test of mixing quantities, we use pH indicator phenolphthalein-ethanol solution. Using detecting the color intensities on the specimens, we quantify the mixing quantity and measure mixing length that is axial length required for 90% mixing.
In the experimental study, AW-type and AWL-type can enhance mixing in microscale. AW-type enhances mixing well in relatively high Re, such as Re=6.5,13. AWL-type enhances mixing in wide range. 0.13