At present a series of phenomenological models are used for the description of flow curves of viscoplastic materials. Their application for the given materials hitherto s [...]

This contribution aims at the measurements of elongation viscosity for polyethylene materials. The approach is analysed from the viewpoint of possible degradation of mate [...]

Avoiding the Independent Alignment (IA) approximation in the classical Doi-Edwards model causes the computation extremely time and hardware consuming. Nevertheless some f [...]

An additive method enabling a direct determination of axial flow rate for viscous (power-law model) and viscoplastic (Vo adlo model) fluids in concentric annuli is presen [...]

A number of papers have aimed at an analytical solution of an axial annular flow of power-law fluids, especially a relation: volumetric flow rate vs. pressure gradient. N [...]

In food industry a back extrusion represents one of the cheapest and time-saving experimental methods how to determine rheological characteristics of the fluids studied. [...]

The aim of this contribution is to present an empirical model taking into account ageing of highly concentrated emulsions. This model enables smooth passage from modellin [...]

This contribution aims at a determination of dependence of shear viscosity of polyvinylbuthyral (PVB) on the intensity of electric field to which PVB solutions are expose [...]

One type of integral is frequently met in various description of behaviour of polymer materials through molecular-based models starting with the classical Doi-Edwards one [...]