DOI: 10.24411/2076-6785-2020-10080
Abstract
The effect of shear stress modes on the formation of the dispersed phase of colloidal oil particles is studied. Based on the thermodynamic approach to the formation of aggregates of colloidal oil particles, the concept of developing modes within the framework of fractal viscosity theory is proposed. The obtained experimental results confirm the fractal theory and demonstrate the possibility of creating a procedure for exposure the shear rate, which leads to a significant steady decrease in oil viscosity.
Materials and methods
Measurements were made using a viscometer " Physica MCR 301 " by Anton Paar (Austria) with a measuring system in the cone-plate geometry. To measure the viscosity, a sample of a colloidal solution having an initial temperature of 20°C and being at this temperature for at least 10 days it was placed in a cell and cooled to a set temperature, kept at this temperature for 30 minutes, after which measurements were made of the dependence of η on G. The viscosity measurements were performed at a constant temperature of 10°C. The time interval after which the stationary value of η was fixed was depended on G. In this registration mode, the viscosity value corresponding to the
thermodynamic equilibrium at a given temperature and the value of G.
Keywords
viscosity, petroleum, fractal theory, colloidal particle, shear rate, thermodynamics, shear exposure mode
