Discontinuous shear thickening of dense suspensions is a phenomenon in which, at a specific shear rate, the viscosity increases discontinuously often by orders of magnitude. Recent modeling of the phenomenon suggests that the viscosity jump in rate-controlled rheometry corresponds to an underlying S-shaped flow curve in stress-controlled conditions. This nonmonotonic rheology was observed in...
We performed start-up experiments with concentrated hard-sphere suspensions around the glass transition. Rheo-confocal experiments were carried out to link the macroscopic rheological response to the single-particle structure and dynamics. During the start-up of shear, suspensions of large particles (diameter ≈1.6μm) showed a transient non-linear velocity, resembling shear bands without a...
“Why should one wish to make measurements with ever increasing precision? Because the whole history of physics proves that a new discovery is likely to be found lurking in the next decimal place.” (Floyd K. Richtmyer, 1931)
Since the days of Perrin, microscopy methods have played an important role in the study of colloidal suspensions. Along with the continued development of new imaging...
