Numerical Simulation of Fluid Flow and Heat Transfer in a Twin-Screw Extruder

摘要

Extrusion is an important manufacturing method in many industries. The process isparticularly useful when thermal and/or mechanical means are required to obtain a uniformly processed product in a continuous operation. Most of the working materials can be characterized as non-Newtonian, which implies that the shear stress is a function of the strain rate. Much experimental and numerical work has been directed toward the understanding of the transport phenomena underlying the extrusion process, especially in the field of single-screw extrusion, see Tadmor and Gogos (1979), Fenner (1979), and Tadmor and Klein (1978). However, the published literature on the modeling of twin-screw extruders is relatively scarce, mainly due to the complexity of the geometry and the flow behavior.