64
E. Balasubramanian et al.
Fig. 1 3D model of extruder
Inlet
Outlet
Inlet
Fig. 2 Meshed model of
extruder
2.2 Case(i): Effect of Varying the Screw Speed
By varying the screw spindle speed of extruder, CFD analysis is performed to determine the developed inlet pressure. Simulations are performed for the inlet velocity of
0.028 m/s and varying the spindle speed from 5 to 30 rpm. It is observed from Fig. 3
that, increase in speed leads to have proportional increase in pressure. Based on our
experimental measurements, 20 rpm is considered to be optimal speed at which the
extrusion of slurry is smoother. The simulation results suggested that, at 20 rpm, the
pressure developed at the inlet region of ext ruder is about 0.015 MPa which will
not have any effect on damaging the extruder. The pressure distribution across the
nozzle is shown in Fig. 4 and it is observed that, maximum pressure occurs at the inlet
E. Balasubramanian et al.
Fig. 1 3D model of extruder
Inlet
Outlet
Inlet
Fig. 2 Meshed model of
extruder
2.2 Case(i): Effect of Varying the Screw Speed
By varying the screw spindle speed of extruder, CFD analysis is performed to determine the developed inlet pressure. Simulations are performed for the inlet velocity of
0.028 m/s and varying the spindle speed from 5 to 30 rpm. It is observed from Fig. 3
that, increase in speed leads to have proportional increase in pressure. Based on our
experimental measurements, 20 rpm is considered to be optimal speed at which the
extrusion of slurry is smoother. The simulation results suggested that, at 20 rpm, the
pressure developed at the inlet region of ext ruder is about 0.015 MPa which will
not have any effect on damaging the extruder. The pressure distribution across the
nozzle is shown in Fig. 4 and it is observed that, maximum pressure occurs at the inlet