Using fast confocal microscopy we image the three-dimensional dynamics of particles in a yielded hard-sphere colloidal glass under steady shear. The structural relaxation, observed in regions with uniform shear, is nearly isotropic but is distinctly different from that of quiescent metastable colloidal fluids. The inverse relaxation time tau(alpha)(-1) and diffusion constant D, as functions of ...

We study the propagation of a plane-strain hydraulic fracture driven by shear thinning fluid following Carreau rheology. restrict to impermeable medium case and quantify in details impact on growth shear-thinning properties between low high shear-rates Newtonian limits. derive several dimensionless numbers governing evolution solution. The notably depends ratio two limiting viscosities, index, ...

Rheological characteristics of Al2O3, CuO and TiO2 nano particles were investigated in oil asthe base fluid at 1 and 2 wt.%. Constitutive relations for non-Newtonian fluid were discussedbased on the power-law model. Measured viscosities of each nanofluid were used to evaluatethe power-law and consistency index. Results indicated that the nanofluid viscosity decreasedby increasing the concentrat...