Computational fluid dynamics analysis is the science which determines the solution of governing equations of fluid flow. One dimensional fully developed laminar viscous flow with Reynolds no Re < 5 is considered for study. The study deals the computational analysis of melt flow behaviour of feed wire and flow rate of extruded Poly lactic acid (PLA) feed wire. In it the effect of nozzle geometrical parameter, nozzle angle and exit diameter effect on pressure drop across the nozzle and its effect on melt flow behaviour studied. The nozzle angle varies from 300 to 1200 and exit diameter from 0.2 mm to 0.4 mm for 3 mm PLA feed wire. The computational results shows that continuous feeding of feed wire and proper melt flow behaviour are achieved at optimum nozzle geometry parameter nozzle angle 1200 and exit diameter 0.2 mm.
