Rheological Features of Structural-Forming Disperse Systems

Volume 7 Issue 3 May - July 2017

Research Paper

Rheological Features of Structural-Forming Disperse Systems

Geylani M. Panakhov*, Eldar M. Abbasov**, Tahir S. Gadjiev***, Sayavur I. Bakhtiyarov****

* Department Chief, Department of Fluid and Gas Mechanics, Institute of Mathematics and Mechanics, Azerbaijan National Academy of Sciences, Baku, Azerbaijan.

** Scientific Researcher, Department of Fluid and Gas Mechanics, Institute of Mathematics and Mechanics, Azerbaijan National Academy of Sciences, Baku, Azerbaijan.

*** Professor, Department of Mathematical Physics, Baku State University, Baku, Azerbaijan.

**** Professor, New Mexico Institute of Mining and Technology, Socorro, USA.

Panakhov, G. M., Abbasov, E. M., Gadjiev, T. S., and Bakhtiyarov, S. I. (2017). Rheological Features of Structural-Forming Disperse Systems. i-manager’s Journal on Mechanical Engineering, 7(3), 1-9. https://doi.org/10.26634/jme.7.3.13576

Abstract

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.