Influence of the Rheological Properties of a Polymer Melt on the Hydrodynamic Characteristics of its Vortex Flow in a Convergent Channel

The influence of the temperature of the flow of a polymer melt in a plane, convergent slot channel on the size of the vortex-flow region at the inlet of its slot part was considered. The fields of velocities, stresses, and pressure of the flow of a polymer melt in such a channel were constructed with the use of the modified Vinogradov-Pokrovskii model generalized with regard for the nonmonotonic dependence of the viscosity gradient of this melt on its tension. The dependences of the initial viscosity of the polymer melt and the sizes of its vortex flow region in the channel on the temperature in it and the dependence of the sizes of the vortex zone of the polymer-melt flow on its rate were determined.