Transient finite element analysis of generalized Newtonian coextrusion flows in complex geometries

A two‐dimensional transient finite element model capable of simulating problems related to two‐layer polymer flows has been developed. This technique represents an effective tool which can be used to study the possibility of the onset of interfacial instability in coextrusion flows, considering melt rheology as well as the fluid–geometry interaction. A code has been developed to solve the transient problem of the flow of bi‐component systems of …