INFLUENCE OF THE RHEOLOGICAL PROPERTIES OF A POLYMER MELT ON THE HYDRODYNAMIC CHARACTERISTICS OF ITS VORTEX FLOW IN A CONVERGENT CHANNEL

The infl uence of the temperature of the fl ow of a polymer melt in a plane, convergent slot channel on the size of the vortex-fl ow region at the inlet of its slot part was considered. The fi elds of velocities, stresses, and pressure of the fl ow of a polymer melt in such a channel were constructed with the use of the modifi ed 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 fl ow region in the channel on the temperature in it and the dependence of the sizes of the vortex zone of the polymer-melt fl ow on its rate were determined
The infl uence of the temperature of the fl ow of a polymer melt in a plane, convergent slot channel on the size of the vortex-fl ow region at the inlet of its slot part was considered. The fi elds of velocities, stresses, and pressure of the fl ow of a polymer melt in such a channel were constructed with the use of the modifi ed 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 fl ow region in the channel on the temperature in it and the dependence of the sizes of the vortex zone of the polymer-melt fl ow on its rate were determined
Author:  G. O. Rudakov, G. V. Pyshnograi, D. É. Vaitsel′, Yu. A. Pavlyuk
Keywords:  rheology, viscosity, temperature, polymer melt, equation of state, two-dimensional vortex fl ow
Page:  1178