Micromixers, active passive

V. Flessel, FI. Lowe, F. Schonfeld, Micromixers-a review on passive and active mixing principles, Chem. Eng. Sci. 60 (2005) 2479. 

Keywords Active micromixers Microfluidics Micromixing Mixing principles Passive micromixers... 

Microfluidic-based mixers allow ultrafast reactions to take place in the kinetically limited regime by achieving faster mixing, which is usually obtained by a complex coupling of increases in the advective flux and interfacial area. The micromixers that have been developed can be categorized into active and passive mixers. 

Table 4.1 Passive and active mixing techniques used in micromixers.

Figure 4.14 Schematic representation of selective passive and active mixing principles used in micromixers [26]. (Adapted with permission from the authors.)...

In contrast to the presented passive mixers, active micromixers rely on external power input to introduce perturbations within the laminar flow to accelerate mixing. A selection of different external perturbation sources are summarized in Table 4.1 and are discussed briefed here. 

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