Rheology of Generized Newtonian Fluids

Abstract

Polymer processing such as injection molding, extrusion or compression molding deals with a polymer melt flows between gaps or channels of a production mold. The flow characteristics of the melt in the channels are considered shear flows which express non-Newtonian behaviors. The non-Newtonian flow behavior is normally different from Newtonian one in that the non- Newtonian fluids are mostly a function of shear rate . In this article, we introduce some generalized Newtonian fluids (GNF) which are wildly used in polymer processing, for example, power-law, Carreau-Yasuda, Bingham and Herschel-Bulkley fluids.