Chip serpentine path

Reactor [R S] Chip Micro Reactor with Extended Serpentine Path and Ports for Two-step Processing... 

This is also (see [R 6]) a commercial chip ( Radiator ), provided by MCS, Micro Chemical Systems Ltd., The Deep Business Center [20]. A bottom plate contains an extensively wound serpentine channel. A top plate covers this microstructure. The two reactant solutions enter via capillary tubing through holes in the top plate. The first reactant is fed at the start of the serpentine path and the second enters this path in a short distance. Shortly before the end of the serpentine, a third stream can enter which may serve, e.g., for dilution and thus quenching of the reaction. After a very short passage, the diluted streams enter via a fourth port analytics. Commercially available capillary connectors were employed. 

Reactor type Chip micro reactor with extended serpentine path and ports for two-step processing Serpentine micro channel width depth 100 pm 25 pm... 

In order to reduce variations in flow due to secondary forces such as capillary forces within reservoirs, the flow resistance at each port is increased by using a long serpentine path as a flow restrictor (see Figure 2.37). This chip design also contains the so-called pair-well design so that two channels from the pair wells (e.g., wells 1 and 8) are connected to a common node. Since the pair channels have the same flow resistance, the change of flow in one channel could be easily compensated by that from another channel and so keeping the main channel flow constant. For instance, a 40% flow in the main channel can be achieved by either -4% from well 1 and +44% from well 8, or 4% from well 1 and 36% from well 8 [295],... 

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