Simulations for orientation level
Since the modelled and measured MWDs are related to molecular orientations at different deformations,
we can use the principle reported to model orientation during flows and for final end products,
where a high degree of orientation can cause warping and dimensional deviations over time.
This would simultaneously provide accurate and complete pressure data, and an explanation for the entrance effects.
Also, the filling phases of high-speed injection moulding could be simulated based on measured data,
which is not possible by other ways using the original measured viscosity data for 1840H LDPE.
The orientation for a mobile-phone cover during the filling phase of injection moulding
at one layer is shown in Fig in colour, where regions with higher % values are darker
(where the orientation was also higher). The filling was complete in 0.3 s, and there was
nonhomogeneous turbulence in the orientation at t=0.1 s during the filling phase (as shown in Fig.).