title: Discontinuous shear thickening of frictional hard-sphere suspensions.
abstract: Discontinuous shear thickening (DST) observed in many dense athermal suspensions has proven difficult to understand and to reproduce by numerical simulation. By introducing a numerical scheme including both relevant hydrodynamic interactions and granularlike contacts, we show that contact friction is essential for having DST. Above a critical volume fraction, we observe the existence of two states: a low viscosity, contactless (hence, frictionless) state, and a high viscosity frictional shear jammed state. These two states are separated by a critical shear stress, associated with a critical shear rate where DST occurs. The shear jammed state is reminiscent of the jamming phase of granular matter. Continuous shear thickening is seen as a lower volume fraction vestige of the jamming transition.
authors: Benjamin Levich Institute, City College of New York, New York, New York 10031, USA.
authors: Ryohei
authors: R
authors: Seto
authors: Romain
authors: R
authors: Mari
authors: Jeffrey F
authors: JF
authors: Morris
authors: Morton M
authors: MM
authors: Denn