JME_V7_N3_RP1
Rheological Features of Structural-forming Disperse Systems
Geylani M. Panakhov
Eldar M. Abbasov
Tahir S. Gadjiev
Sayavur I. Bakhtiyarov
Journal on Mechanical Engineering
2249-0744
7
3
1
9
Pulsation, Heterogeneous Fluid, Thixotropy, Oscillations, Pipe, Amplitude, Velocity, Pressure, Disturbing Motion, Flow
This article presents the results of an investigation of the viscosity anomaly in the flow of disperse systems. Dispersed systems with a spatial structure have been investigated, the framework of which is not completely destroyed up to certain values of the shear rate. The process of destruction-restoration of internal bonds of a heterogeneous structure is experimentally studied, in which the elements responsible for the thixotropic behavior of the fluid appear. The values of the volume fractions of the dispersed phase and the intensity of the perturbation amplitude (shear rate) are determined, at which the process of destruction and restoration of the structure of the medium begins during its flow. The rheological behavior of the spectrum of compositions, including oil and polymer additives in certain volume fractions was studied, which was used as a 0.1% aqueous solution of polyacrylamide in a ratio of 1 vol. %, 2 vol. %, 3 %, 4 %, and 5 %. Some aspects of the behavior of heterogeneous liquids under conditions of variable component composition of fluids and changing external thermobaric conditions are considered. A heterogeneous oil-polymer system was studied at low shear rates. In this area, a relationship is established between changes in the composition of the internal structure of the composition with the processes of its destruction and recovery. A spontaneous relaxation-thixotropic damped oscillation in a structured system is estimated.
May - July 2017
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