dilatant

For a Newtonian fluid n =1, for a dilatant fluid n >1 and pseudoplastic fluid n <1).

For description of more complicated viscosity curves, for example, with pseudoplastic and dilatant regions in different shear stress/shear rate ranges, the presented equations can be generalized to multimode models expressed formally as products of two or more basic equations from one of the main groups.

For [[mu].sub.0] = 0, if p < 2 then it is a pseudo-plastic fluid, and if p > 2 then it is a dilatant fluid (see [14]).

Previous studies [1-6] of compressive microfracture have suggested strongly that stress-induced microcracks in rock are caused by the tensile, rather than shearing, are axial in orientation, and are responsible for observed dilatant and hysteretic effects.

This is attributed to the energy-dissipation increase with the shear rate, resulting in shear-thickening (dilatant) behavior [28].

Among his topics are preparing suspensions using the top-down process, the electrostatic stabilization of suspensions, sedimentation of suspensions and preventing the formation of dilatant sediments, non-aqueous suspension concentrates, and applications of suspensions in paints and coatings.

The value of n determines the class of the fluid; that is, for n = 1, the fluid is Newtonian, n > 1, the fluid is shear-thickening (dilatant), and n < 1, the fluid is shear-thinning (pseudoplastic) or viscoelastic.

The results obtained for both MLSS concentrations show that the flow behaviour index n was greater than one; at the lower MLSS concentration of 150 g [L.sup.-1], the sludge exhibited shear-thickening (dilatant) behaviour, with the estimated yield [[tau].sub.y] stress equal to zero.

Deformation of rock: a pressure-sensitive, dilatant material.

This becomes extremely important when pumping abrasive liquids and dilatant slurry.