@article{Леваничев_2015, title={Analysis of the total rheological model of the polymer melt flow}, volume={2}, url={http://journals.uran.ua/eejet/article/view/38951}, DOI={10.15587/1729-4061.2015.38951}, abstractNote={<p>Plastics processing is regulated by the shear strain rate, so developing the flow models in a wide range of shear rates is an urgent task.</p><p>A comparative analysis of the total rheological curves of the polymer melt flows using two flow models was performed. The Levanichev "slug" flow model is based on a physical model and assumes that the non-Newtonian flow area occurs when the melt flow rate approximates to the relaxation rate. The Carreau model is semi-empirical, viscosity limit values and relaxation time are taken into account, non-Newtonian flow area is described by the flow index.</p><p>As a result of the analysis, the viscosity prediction errors were identified, and advantages of the "slug" flow model were shown. The method for calculating the flow of non-Newtonian fluid, where viscosity is understood as a change in the interaction area, resistance to the melt compression and overcoming melt adhesion to the channel walls was given, a new viscosity dimension was proposed.</p><p>A number of effects that arise during the plastics processing and engineering methods based on the physical model, describing the total rheological curve ("sharkskin", "diedroop", "discopurgeprocedure") was qualitatively considered.</p>}, number={6(74)}, journal={Eastern-European Journal of Enterprise Technologies}, author={Леваничев, Виталий Валерьевич}, year={2015}, month={Apr.}, pages={11–16} }