Parametric study of FENE and FENE-P models in steady and unsteady flow in a circular pipe using CONNFFESSIT approach

► For the first time start-up Poiseuille flow of the FENE model is simulated using the CONNFFESSIT. ► Transient rheological behavior of the FENE and FENE-P models is compared. ► Effects of structural and processing parameters on material functions are studied. ► In pipe geometry it is possible to obtain the material functions over a shear rate range in a single run.