A network-analysis-based comparative study of the throughput behavior in double wave screw geometries
Sprache des Vortragstitels:
Antec 2018 - Orlando, Florida
Sprache des Tagungstitel:
We present a systematic approach based on networks that uses tensor algebra and numerical methods to model and calculate selected double wave screw geometries in terms of pressure-throughput behavior. Due to the extreme diversity of their geometries, describing the flow behavior is difficult and rarely done in practice. Three-dimensional CFD methods (finite-element or finite-volume) are well capable of calculating the flow behavior in complicated geometries, but they require vast computational power, large quantities of memory, and consume considerable time to create a geometric model created by computer-aided design (CAD). Consequently, a modified 2.5-dimensional finite-volume method, termed Network Simulation Method (NSM) is preferable.
The main goal of this study was to compare the results of the NSM with CFD. The results for isothermal melt-dominant flow correlated well. With recently developed pressure-/throughput models for two- and three-dimensional flow of shear-thinning fluids the accuracy of NSM could be further improved. This makes network analysis a valid and easy-to-use tool for screw calculations in practice.