Flow grooved mixer

M 80] [P 70] From prior experience with the chaotic screw extruder, it was estimated that the presence of the barrier structures in the barrier-embedded mixer accounts for about a 10% reduction in flow rate as compared with the slanted grooved mixer [58], Thus, a large mixing improvement is given at the cost of only a small reduction in flow rate. 

A mixer, which is part of a sensor system, has diagonal grooves on the channel bottom [142], This creates a lateral flow enlarging the interfacial area. No indication is given whether this measure causes the flow to become chaotic. 

M 75] [P 66] 3-D twisting flow is found for a mixer design with an array of multiple obliquely oriented, straight grooves [44]. 

Figure 1.167 (a) Characteristic mixing length of all three micro devices and (b) detailed view of the mixing length of the barrier embedded and slanted grooved micro mixers only, as a function of the flow regime, (c)... 

M 80] [P 70] Cross-sectional images of the flow patterns, gained by confocal microscopy, demonstrate the interfacial stretching and hence are indicative of mixing in the barrier-embedded mixer [58], At the non-barrier entrance structure clearly the helical flow induced by the slanted grooves is evident. In the barrier... 

Intensification of liquid mass transfer can also be achieved by structuring the channels of falling film plates in the form of staggered grooves in herring bone arrangements (Figure 7.14b) [52, 53] as presented in Section 4.4.1. This kind of chaotic mixers are very efficient at low Reynolds numbers and allow, in addition, to narrow the residence time distribution of laminar flow (Section 3.6.2). 

As expected, some particles flow over the modified flight while others flow through the groove. Again, this effect will increase the distributive and dispersive mixing capability of the mixer. Simulation of the CRD mixer is discussed further in Section 12.4.3.6 (see Figs. 12.48 to 12.50). 

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