Convection mixing high shear

An extruder is a suitable apparatus for handhng high-viscosity polymer melts continuously. Mixing of a polymer melt and supercritical CO2 takes place in an extruder because of the shear action and the convection mechanism. During this process, a single-phase solution forms, and the time needed is minimized because the shear actions in an extruder decreases the striation thickness and the diffusion distances. 

Bas-relief micromixers induce transversal motion, when miscible liquids are considered, to mix by convection [92,93]. In the gas-liquid case to be considered here, the mechanism for bubble formation is yet unclear, but likely related to shear forces coming from a similar liquid motion in the dispersed flow. Caterpillar mixers induce such transversal motion by ramp-like microstructures, lifted up and down, placed in one channel at the bottom and ceiling [4] (see also Ref. [S6]). Caterpillar mixers were developed as family of devices with grouped capacity using smart enlargement of the internal chaimel and have high volume flows, for example,... 

---