Finite Element Simulation of Polymer Melt Flow in Extrusion Molding Processes

In this study, a non-isothermal non-Newtonian Careau flow model was used to describe the flow of polymer melt, and the Galerkin finite element method was used for spatial dispersion. The flow of polymer melt in the extruder was numerically simulated by this algorithm and the distribution law of polymer melt velocity, viscosity, pressure and temperature in the flow channel was obtained. The influence of inlet pressure on outlet velocity was analysed, which provided a theoretical basis for the correct design model and process formulation.