Non-Newtonian Flow of Structured Systems. XIII. Thixotropic Properties

Abstract
Thixotropic properties of fluids are associated with sample structure change. In terms of structural rheological model the structure changes are expressed in destruction and formation of particle aggregates. The equations to describe the quasi-equilibrium flow and the changes in shear stress with time at constant shear rate are proposed. Hysteresis of flow curves is described in the framework of structural rheological model. Antibate coefficients of generalized flow equation are explained. The dependence of shear stress on time is determined. The presented model of thixotropic behavior is used in order to describe the flow of suspensions, emulsions and other colloidal systems.

Keywords: structural rheological model, thixotropic properties