12.2.8. Rheological Model and Properties

The model for flow-induced crystallization suggested here involves a long series of material parameters. They are currently available for a limited range of materials, while protocol measurements and techniques for parameter identifications still have to be developed.

The FIC model actually involves the evaluation of three tensors: , , and an auxiliary tensor for . This can be computationally expensive, especially for 3D flows. Hence the present crystallization model is available in single-mode only. The use of a modified Giesekus model with finite chain extensibility is endowed with realistic rheological properties, such as shear thinning and normal stress differences.