Abstract
Flow through tubular runners presented is a very important flow type encountered in polymer processing, especially during injection mold filling. The filling pattern developed during the mold filling plays a decisive role on the final part quality, thus, in this paper we have investigated the filling pattern and the volumetric flow rate during the filling of a tubular runner for three different materials. The melt is treated as an incompressible, non-Newtonian the Ostwald-de Waele model with a power-law relationship between the shear stress and the shear rate. Keywords: runner, injection molding, flow front, polymer melt