50 Years of the K-BKZ Constitutive Relation for Polymers
Figure 9
Differences in flow behavior of polyethylene melts in a 20 : 1 axisymmetric abrupt contraction at the same capillary wall shear stress of MPa (simulation results with the K-BKZ/PSM model): (a) branched LDPE at s−1, (b) linear HDPE at s−1. The flow is from top to bottom.
