NOSTATATIONAL FLOWS OF ELASTIC STICKING FLUID IN FLAT CHANNELS

The [1-7, 11-13] researchs show that problem solving which about nonstationary flow of elastic adhesive fluid in flat channels and pipes leads to serious mathematical difficulties. Therefore simplification methods are used to solve problems , or problem [5-10] is solved on the basis of average velocities along the pipe section. In some sceintific works ([11-13]) In most cases in a nonstationary flow, fluids flowing in them, the occurrence of anomalous (non-traditional) events in the transition processes that depend on their rheological properties. In this article, specific problems of nonstationary flow of elastic viscous fluids in flat channels are solved. The main goal in this, study the motion of elastic viscous fluids on the basis of simplified mathematical models and compare the results with the laws of transition processes in a non-stationary Newtonian fluid, is to identify new hydrodynamic effects that differ from it.