– We study the strain response to steady imposed stress in a spatially homogeneous, scalar model for shear thickening, in which the local rate of yielding Γ(l) of mesoscopic ‘elastic elements’ is not monotonic in the local strain l. Despite this, the macroscopic, steady-state flow curve (stress vs. strain rate) is monotonic. However, for a broad class of Γ(l), the response to steady stress is n...

Dilute oil dispersions of carbon black particles with attractive Van der Waals interactions display shear thickening in two distinct regimes. The first occurs at low shear rates, γ̇c1 ≈ 100s−1 along with the formation of vorticity aligned shear-induced structures. The second high shear regime with γ̇c2 ≈ 102−3s−1 is driven by hydrodynamic breakup of clusters. Pre-shearing in the high rate shear t...

Quantitative modelling of the rheology non-Newtonian fluids requires significant empirical input due to very complex behaviour bulk fluid as a result particle-scale physics fluids. The existing models are mainly limited certain dynamics conditions such shear rate, stress, etc. Adopting Doolittle's free volume theory approach, we have proposed an equation describe relative volume-dependent visco...

We report the results of an investigation into the rheology of solutions of natural spider silk dope (spinning solution). We demonstrate that dilute dope solutions showed only shear thinning as the shear rate increased while more concentrated solutions showed an initial shear thinning followed by a shear thickening and a subsequent decline in viscosity. The critical shear rate for shear thicken...

15 Shear thickening in a fluid occurs when the viscosity of the fluid increases with 16 increasing applied strain rate. When the rise in viscosity occurs by orders of magnitude, the fluid 17 undergoes discontinuous shear thickening, which can be devastating in industrial applications. 18 We present a particle-scale numerical technique that can simulate these phenomena. By coupling 19 the discre...

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 sta...

By introducing a state variable, we construct a phenomenological fluid dynamical model of a dilatant fluid, i.e., a dense mixture of fluid and granules that shows severe shear thickening. We demonstrate that the fluid shows shear thickening oscillation, namely, the fluid flow oscillates owning to the coupling between the fluid dynamics and the internal dynamics of state. We also demonstrate tha...

Magnetorheological (MR) materials and shear thickening fluids are both smart material and their combination could offer both MR and ST effects. This study looks at the properties and behaviour of magnetorheological shear thickening fluid (MRSTF) in particular whilst applied as a semi-active energy absorber. A device with two forms of varying vibration control has been created and measured. The ...