Abstract
Three dimensional nonisothermal flow simulations in the single-screw extruder were performed using a collocated cell-centered finite volume method. For the melt conveying zone of a single screw extruder, through Fenner’s example, the pressure distribution and temperature profile are investigated numerically in this study. Comparing results with conventional 2D FDM for the thermally developing flow, some discussion is proposed in this thesis. The enthalpy formulation and the local liquid fraction method are introduced to simulate the plasticating phenomena in the single screw extruder. A reasonable agreement is obtained between the simulation result and experimental measurement for fusion length. In additional, not like the 2.5D simulation, 3D simulation can compute the solid bed position, so we can observe the local solid fraction in the screw channel directly.