Numerical Simulation of Mold Filling in Injection Molding with Incompressible Leonov Fluid Model

On the basis of incompressible Leonov constitutive relation, the numerical model was established for the mold filling in the injection molding of viscoelastic polymers. The finite element/finite difference/control volume methods were adopted for numerical simulation of the distribution of pressure, shear stress and first normal stress difference. A center-gated disk filling flow was taken as a benchmark case to verify this model and methods. The results of numerical simulation such as fill time, pressure traces, the first normal stress difference and shear stress have good agreement with the experimental results presented in the former literature.