Abstract: Mixing performance of triangle arrayed threescrew extruder and twinscrew extruder was compared using Polyflow. Threedimensional isothermal flow in the extruders was simulated through tracer particles method. Through statistical treatment of numerical results, mixing performance was characterized in terms of mixing index, area stretch, and the residence time distribution. Subsequently, experiments were carried out with the same condition as the simulation. It showed that the experimental data were in good agreement with the simulated results.

Key words: three-screw extruder, twin-screw extruder, experimental verification, mixing characteristics