Staggered herringbone micromixer

Fig. 7.7 Geometry of a staggered herringbone micromixer (left) and a curved channel to induce Dean Vortexes with corresponding secondary flow patterns (right). Arrow indicates flow [92].

Hassell D, Zimmerman W (2006) Investigation of the convective motion through a staggered herringbone micromixer at low Reynolds number flow. Orem Eng Sci 61(9) 2977-2985... 

Most recently, a modular microfluidic reactor and in-line filtration system for the rapid and small-scale evaluation of biocatalytic reactions have been demonstrated by O Sullivan and others [153]. The system combined a substrate with a biocatalyst in free solution. The PMMA enzymatic microreactor worked by co-flowing the enzyme and substrate through a T-channel and mixing was achieved by staggered herringbone micromixer (SHM). The filtration unit composed of gaskets made of PDMS... 

Figure 7.8 Modification of mixing channel for chaotic advection at low Pe (a) slanted ribs, (b) slanted grooves [74, 75], (c) staggered-herringbone grooves [74, 75], (d) patterns on both top and bottom of the mixing channel, (e) groove pattern vertical to mail flow, and (f) one of patterns for surface modification in a micromixer with electrokinetic flows [80].

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