Abstract
Flow of polymers into planar mold cavities of irregular shapes is analyzed numerically. The Hele-Shaw approximations are used to simplify the general flow equations which are then solved over the irregularly shaped flow domain using a numerically generated grid. The non-isothermal nature of the flow is modelled, including a temperature and shear-rate dependent viscosity. The temperature distribution in the flow field is calculated using a three-dimensional, transient approach while the prediction of the free surface locations is made using a pseudo steady-state approximation, neglecting the inertial terms. The computational predictions are compared with analytical results and experimental observations indicating good accuracy. The applications of the approach are demonstrated through various examples.
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