Mechanical analogue of rheological models, demonstrating the effect of “solidification”

The mechanism description with the behavior similar to behavior of liquid with "hardening" at shift is provided

Mathematical modeling of rheological behavior of a nonlinear-viscous fluids, which demonstrate the effect of “solidification”

Тhe rheological models of a liquid, which takes into account the effect of “solidification” is considered

MATHEMATICAL MODEL OF THE RHEOLOGICAL BEHAVIOR OF VISCOPLASTIC FLUID, WHICH DEMONSTRATES THE EFFECT OF “SOLIDIFICATION”

Summary. The irregular behavior of some kinds of suspensions on the basis of polymeric compositions and fine-dispersed fractions is characterized. As a simple, one-dimensional, shearing, viscometric flow such materials demonstrate the following mechanical behavior. There is no deformation if the shear stress does not exceed a certain critical value. If this critical value is exceeded, the flow is begins. This behavior is well-known and corresponds to the rheological models of viscoplastic fluid. However, further increase in the shear rate results in “solidification”. The rheological model of such viscoplastic fluids, mechanical behavior demonstrating the “solidification” effect is offered . This model contains four empirical parameters. The impact of the exponent on the dependence of the shearing stress and effective viscosity on the shear rate in the rheological model is graphically presented. The rheological model extrapolation on the three-dimensional flow is proposed

ANALYSIS OF SOME OF THE FEATURES OF THE VELOCITY FIELD IN THE CASE OF THE FLAT OF THE FLOW OF LIQUIDS, RHEOLOGICAL MODEL WHICH TAKES INTO ACCOUNT THE CROSS-VISCOSITY

Тhe rheological model of a liquid, which takes into account the effects of the cross – viscosity is considered. The analysis of some peculiarities of the development of the velocity field is carried out

ANALYSIS OF THE MAIN SCHEMES SHIFT FORWARD FLUID FLOW, DEMONSTRATING THE MANIFESTATION OF THE "HARDENING", IN THE GAP BETWEEN COAXIAL CYLINDERS

The analysis of the five major schemes of the forward flow of fluid, demonstrating the effect of “solidification”, in the clearance between coaxial cylinders is carried out

Method of rheological model parameters determination, demonstrating “solidification” effect, on the basis of the consumption channel characteristic analysis

We consider a method for determining the parameters of a rheological model of the fluid, which demonstrates the effect of “solidification”. Example on the use of the proposed algorithm is given