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Dimensionless calculations for throughput and pressure gradients are reported for flow of non-Newtonian fluids in screw and kneading disk elements of a modular intermeshing self-wiping corotating twin screw extruder. These calculations are applied to compute pressure and fill factor profiles along the axis of commercial twin screw extruders of varying scale. The used twin screw geometries are found to allow scaling for both the double threaded/tipped and triple threaded/tipped screw/kneading disc families. Dimensionless calculations are presented and applications to modular machines design are described.

Dimensionless Non-Newtonian Isothermal Simulation and Scale-up Considerations for Modular Intermeshing Corotating Twin Screw Extruders