2 TYPES OF FLOW CURVES OF STRUCTURED DISPERSE SYSTEMS

The characteristics of two types of flow curves of structured disperse systems characterized by a unique (type I) and nonunique (type II) cu rve of the effective viscosity as a function of the shear stress were examined and analyzed. Primary attention was focused on curves of the second type, as they have been less studied but are important in descr ibing the theological properties of concentrated disperse systems. Pos sible mechanisms of degradation of the structure related to the appear ance of an anomalous viscosity vs. shear stress curve were examined It was shown that application of a vibrational field to a deformable dis perse system eliminates the anomaly characteristic of type II curves. A combination of the effect of vibration and SF additives (plasticizer s) significantly (by several orders of magnitude) decreases the level of the energy fed to the system required for attaining the lowest visc osity level - creation of the greatest fluidity. An example of the rea lization of this principle for highly concentrated water-coal suspensi ons during water transport for subsequent combustion by a liquid fuel scheme is given.