Micro-scale viscosity model and viscous heating for polymer melt flowing through microchannels

摘要

The effects of viscosity variety on the polymer melt flowing in microchannels are investigated. Side-dependent viscosity, namely microscale viscosity model for filling stage in micro injection molding is built in term of modelling correct law. The pressure loss values obtained from numerical simulation and experiments are compared and analyzed. With microscale viscosity model, the polymer melt flowing in different microchannel sections at different shear rates is simulated. The temperature distribution attained with microscale viscosity model is reasonable and different from that with conventional viscosity at sections of the same position.