The figure on the right shows the streamlines and the pressure distribution in an extruder die obtained through simulation. Here the die is modeled as an axi-symmetric tube with a conical converging section. Flow of a non-Newtonian fluid is modeled by a power-law model. The outlet is at zero reference pressure and the inlet is set at a higher pressure. The exit velocity is obtained for various inlet pressures through simulation as shown in the adjustment figure. Hence the extruder die characteristics can be obtained through simulation.