Comment on "Constant stress and pressure rheology of colloidal suspensions"

Atsushi Ikeda (1) , Ludovic Berthier (1) , P. Sollich (2)

1 L2C - Laboratoire Charles Coulomb
2 King‘s College London

In a recent Letter, Wang and Brady (WB) [1] analyse the rheology of Brownian hard spheres using constant stress and pressure Brownian dynamics simulations. The main observable is the shear viscosity, η( ̇γ,Π), expressed as a function of the shear rate ̇γ and adimensional pressure ̄Π = Πa3/(kBT), where Π is the pressure, kBT the thermal energy, and a the average particle diameter. The central conclusion is the discovery of a “universal viscosity divergence”

Domaines: Matière Molle [cond-mat.soft]

Atsushi Ikeda, Ludovic Berthier, P. Sollich. Comment on "Constant stress and pressure rheology of colloidal suspensions". Physical Review Letters, 2016, 116, pp.179801. ⟨10.1103/PhysRevLett.116.179801⟩. ⟨hal-01310551⟩